Geometry Quadrilaterals & Polygons 5

Question 1

What is the area of a rhombus with diagonals of 8 and 6?

Accepted Answer

24

Answer

Area = ½ × d₁ × d₂ = ½ × 8 × 6 = 24.

Question 2

A polygon with 12 sides is called a:

Accepted Answer

Dodecagon

Answer

A 12-sided polygon is named a dodecagon.

Question 3

In an isosceles trapezoid, the base angles are:

Accepted Answer

Congruent

Answer

An isosceles trapezoid has congruent base angles along each parallel side.

Question 4

The sum of the exterior angles of any convex polygon is:

Accepted Answer

360°

Answer

The exterior angles of any convex polygon always total 360°.

Question 5

If a parallelogram has one angle of 70°, what is the adjacent angle?

Accepted Answer

110°

Answer

Adjacent angles are supplementary, so 180° − 70° = 110°.

Geometry Practice Test