Geometry Quadrilateral 4

Question 1

Consecutive angles in a parallelogram are always:

Accepted Answer

Supplementary

Answer

Consecutive (adjacent) angles of a parallelogram add to 180°, making them supplementary.

Question 2

A square has a diagonal of 10 cm. What is the length of each side (rounded)?

Accepted Answer

7.07 cm

Answer

Side = diagonal ÷ √2 = 10 ÷ 1.414 ≈ 7.07 cm.

Question 3

An isosceles trapezoid is distinguished by having:

Accepted Answer

Congruent legs and equal base angles

Answer

An isosceles trapezoid has congruent non-parallel sides and equal base angles.

Question 4

If a quadrilateral has both pairs of opposite sides equal, it must be a:

Accepted Answer

Parallelogram

Answer

Both pairs of opposite sides being equal is a sufficient condition for a parallelogram.

Question 5

The area of a square is 81 cm². What is its perimeter?

Accepted Answer

36 cm

Answer

The side is √81 = 9 cm, so the perimeter is 4 × 9 = 36 cm.

Geometry Practice Test