The figure is a regular polygon with 20 sides.
The figure is a regular polygon of 20 sides.
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°
The triangle AOC is isosceles; has equal base angles .
Sum of base angles should be 45°
Circumference is the term for a special perimeter .
It may be all, but the name for a figure reflecting all the properties is r.... .
900/7 = 129 (rounded) .
The sum of all interior angles is 2x180° = 360°.
BCEF is a rectangle .
As long as the length of one side of the bigger square.
2 of them are right triangles.
EFA , EAB , EAD , EAC , DAB , DAC , DBC , CAB.
Diagonals of parallelograms bisect .
The sum of the two must be 180°.
They are mutually parallel .
In case the figure is drawn scaled/congruent, use your eyes and common sense .
The other two angles of the triangle AFD bisect together 180° .
Simply draw it .
The same property makes a square out of a rectangle .
Parallels are drawn to the sides .
The opposite sides of a parallelogram are equal .
The square is the compactest of all .
Have a look at ry1 .
Given is radius, asked diameter .
3 times D is |AB|.
Triangles are isosceles and right . (In addition try to see the relation with question 4 of this test.)
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