Halloween Sales, Save Up to 50% + Free shipping
gb
     Test     
-Dr.
com
hz

FOURTH GRADE / GEOMETRY 2.2 / TRIANGLES, SIMPLE POLYGONS and CIRCLES

MATHEMATICS IS EASY. PROVIDED THAT ONE WORKS ENOUGH .
ENOUGH IS SKILL DEPENDENT, HAVE TO FIND "ENOUGH" FOR YOUR SIZE.

   PLANE SHAPES WE WILL INVESTIGATE ARE
 ♦ 
TRIANGLES, POLYGONS and CIRCLES
 ♦ A TRIANGLE IS ALSO A POLYGON BUT IT IS THE GATE TO THE WORLD OF POLYGONS AND WE TREAT IT SEPARATELY.

THERE ARE TWO GOLDEN RULES:
1. THE SUM OF INNER ANGLES OF A TRIANGLE IS 180 DEGREES. FOR POLYGONS COUNT THE NUMBER OF TRIANGLES WITHIN.
2. A CLOSED CONVEX SHAPE ALWAYS HAS , FOR THE SUM OF ITS EXTERIOR ANGLES, 360 DEGREES.
y
1. What is the measure of the angle with the question mark in it (∠KVM) ?

!
In case of need for tips get the cursor on "y" or for help click at "ry1/2" .
RY1 RY2



a) 42°
b) 36°
c) 72°
d) 28°


The figure is a regular polygon with 20 sides.
y
2. Z is the midpoint of NM. What is the measure of the angle with the red region in it (∠YZV) ? (Link/q17)

!
In case of need for tips get the cursor on "y" or for help click at "ry1/2" .

RY1 RY2



a) 50°
b) 25°
c) 36°
d) 45°
The figure is a regular polygon of 20 sides.
3. The figure below is a regular pentagon. What is the measure of ∠BAF ?

!
a) 45°
b) 50°
c) 51°
d) 54°
There are 3 triangles in a pentagon and the sum of measures of interior angles is 3x180° = 540° .
Since all angles of a regular polygon are equal, an interior angle in a regular pentagon is 108°
4. The figure below is a circle. What is the measure of ∠BAC ?

!
a) 22 1/2 °
b) 45°
c) 35°
d) 25°
The triangle AOC is isosceles; has equal base angles .
Sum of base angles should be 45°
5. What is the length of the curve around the circle called ?

!
a) perimeter
b) circumference
c) special perimeter
d) parameter
Circumference is the term for a special perimeter .
6. What is the name of the figure below ?

!
a) parallelogram
b) trapezoid
c) tetrahedral
d) rhombus
It may be all, but the name for a figure reflecting all the properties is r.... .
7. ABHI is a square in a regular heptagon having a side common. How big is the ∠CBH (measure of it, in degrees) ?

!


a) 36
b) 45
c) 39
d) 49
900/7 = 129 (rounded) .
8. ABCD is a right trapezoid. How big should ∠B be ?

!


a) 85°
b) 70°
c) 65°
d) 75°
The sum of all interior angles is 2x180° = 360°.
9. The question is in the figure below .

!


a) 7 cm.
b) 14 cm.
c) 10 cm.
d) 20 cm.


BCEF is a rectangle .
10. Both figures are squares. How long is the diagonal of BDFH ?

!


a) 14 cm.
b) 10 cm.
c) 5 cm.
d) 15 cm.
As long as the length of one side of the bigger square.
11. ABCE is a parallelogram. How many triangles accept EF as the height ?

!


a) 12
b) 8
c) 6
d) 4
2 of them are right triangles.
EFA , EAB , EAD , EAC , DAB , DAC , DBC , CAB.
12. How long should DB be ?

!


a) 10 cm.
b) 12 cm.
c) 16 cm.
d) 14 cm.
Diagonals of parallelograms bisect .
13. An angle of a parallelogram is twice as large as the other. What should the measure of the smaller be ?

a) 60°
b) 50°
c) 45°
d) 75°
The sum of the two must be 180°.
14. Which of the properties given below regarding DF and EB are correct ?

I- They are of equal length.
II- They divide EF into 3 equal segments.
III- They are parallel to each other.

!
a) I and III
b) all
c) only I
d) none
They are mutually parallel .
15. EC and AF are bisectors of the opposite angles of a parallelogram. Which of the properties given below regarding them are correct ?

I- They are of equal length.
II- They are parallel to each other.

!


a) all
b) none
c) only II
d) only I
In case the figure is drawn scaled/congruent, use your eyes and common sense .
16. ABCD is a parallelogram. ED and AF are bisectors of the adjacent angles of it.
What is the measure of ∠AFD ?

!


a) 120°
b) 75°
c) 60°
d) 90°
The other two angles of the triangle AFD bisect together 180° .
17. If on the line segment AB as a base two congruent isosceles triangles are drawn with vertices A and B, a ... is formed .

a) trapezoid
b) rhombus
c) rectangle
d) square
Simply draw it .
18. A parallelogram is a rhombus if it has ... diagonals ?

a) bisecting
b) perpendicular
c) equal
d) nonequal
The same property makes a square out of a rectangle .
19. ABC is an isosceles triangle and D is any point on the base. DE is parallel to AB and DF is parallel to AC.
What form has the quadrilateral AFDE ?

!


a) parallelogram
b) rectangle
c) rhombus
d) pentagon
Parallels are drawn to the sides .
20. The same conditions as of the previous question are valid . How long should the perimter of quadrilateral AFDE be ?

!


a) |AB|
b) 2 x |AB|
c) 1/2 x |AB|
d) 1 1/2 x |AB|
The opposite sides of a parallelogram are equal .
21. Among the diagonals of all quadrilaterals having equal perimeters the diagonal of the square has ... length .

a) equal
b) closest
c) minimal
d) median
The square is the compactest of all .
y
22. What is the shape of quadrilateral ABCD of the following figure ?

In case of need for tips get the cursor on "y" or for help click at "ry1/2".

RY1 RY2



a) rectangle
b) square
c) rhombus
d) parallelogram


Have a look at ry1 .
23. How big is |AB| .



a) 17 cm.
b) 24 cm.
c) 12 cm.
d) 20 cm.
Given is radius, asked diameter .
24. Based on the figure below, how big is |AB| ?



a) 17 cm.
b) 7 cm.
c) 14 cm.
d) 21 cm.
3 times D is |AB|.
25. Which choice is the sum of ∠A and ∠B .



a) 120°
b) 150°
c) 180°
d) 240°
Triangles are isosceles and right . (In addition try to see the relation with question 4 of this test.)
This is the feedback!

THANK YOU FOR YOUR VISIT; HOPE WE COULD BE OF USE.
FOR MUTUAL BENEFIT YOU MAY USE OUR FORUM.
© 2011 , Ä°smail GERMAN. ALL RIGHTS RESERVED
PLEASE PREFER GIVING LINK IF THAT SUFFICES

Share |


  
=> test-dr.com
  Logout
   Login


Test-Dr.com
GOOD SITE





Test-Dr.com
USEFUL SITE

VoltRank: Link Exchange
Review www.test-dr.com on alexa.com
Get our toolbar!
Alexa Site Audit
1.0" LCD A2DP Bluetooth MP3 Player FM Transmitter with Caller ID Handsfree (SD/MMC/USB/2.5mm) for $14.81 + Free shipping

Card Reader MP3 Player With TF Card Support/Clip Design for $8.96 + Free shipping

USA Today

New York Times

Los Angeles Times

Times

Time (Magazine)

Newsweek (Magazine)

Nature
Think You Can Teach Abroad
Handmade Necklaces
Handmade Earrings

Velvet Necklaces
top binary options

affiliate
best geld verdienen
von zu
hause
Thai hill tribes
Karen tribal village
farmer, silversmiths
Thailand-to-do.com
Places, Faces, Fun
Search our database
Submit your website
Gain SEO freedirecto
rysubmit.com
RCA Ieftin
Parerea clientilor
despre site