Geometry Basics

A triangle has side lengths of 15m, 15m, and 20m, what type of triangle is it?

• scalene

• acute

• isosceles

• equilateral

Amari folded and cut each piece of paper along the dotted lines shown. Which of the following are the shapes of the four new pieces? Choose two.

• triangles

• rhombus

• trapezoids

• squares

What is the measurement of this angle?

• 130 degrees

• 60 degrees

• 180 degrees

• 50 degrees

Estimate the measurement of this angle.

• 10 degrees

• 80 degrees

• 150 degrees

• 40 degrees

Two lines that intersect and form right angles are called

• parallel lines

• intersecting lines

• adjacent lines

• perpendicular lines

What kind of angle is this?

• right angle

• obtuse angle

• acute angle

• reflex angle

What term best defines these lines?

• parallel lines

• straight lines

• perpendicular lines

• intersecting lines

Quadrilaterals always have

• 4 sides

• 2 sets of parallel lines

• 4 right angles

• 4 equal sides

Which angle has less than 90 degrees?

• acute angle

• right angle

• obtuse angle

• reflex angle

Which angle is greater than 90 degrees but less than 180 degrees?

• acute angle

• right angle

• obtuse angle

• straight angle