We included **HMH Into Math Grade 5 Answer Key PDF** **Module 20 Classify Two-Dimensional Figures **to make students experts in learning maths.

## HMH Into Math Grade 5 Module 20 Answer Key Classify Two-Dimensional Figures

**How many right triangles?**

How many right triangles can you find in the figure?

Answer:

5 right angled

Explanation:

There are 5 right angled triangles in the above given triangle

A triangle in which one of the interior angles is 90° is called a right triangle

**Turn and Talk**

How did you solve the problem?

Answer:

the angle bounded by two lines perpendicular to each other is a right angle.

the angle measures 90°

What other types of triangles appear to be in the figure?

Answer:

-An acute angle is defined as an angle that measures less than 90 degrees

-the angle bounded by two lines perpendicular to each other is a right angle.

the angle measures 90°

– an angle that measures more than 90 degrees and less than 180 degrees.

**Are You Ready?**

Complete these problems to review prior concepts and skills you will need for this module.

**Quadrilaterals**

Name the shape in as many ways as possible, if a trapezoid is defined as having exactly 1 pair of parallel sides. Write quadrilateral, square, rectangle, rhombus, trapezoid, or parallelogram.

Question 1.

Answer:

Explanation:

a flat geometric figure with four sides but with only two sides parallel is a trapezoid.

The above shapes are also the examples of trapezoid

Question 2.

Answer:

Explanation:

A kite shape is a quadrilateral in which two pairs of adjacent sides are of equal length.

The above given shape is kite shape.

Question 3.

Answer:

Rhombus .

Explanation:

A rhombus is a 2D shape with four straight, equal sides with both pairs of opposite sides being parallel.

Question 4.

Answer:

Rectangle.

Explanation:

A rectangle is a 2D shape that has 4 sides, 4 corners, and 4 right angles.

**Classify Angles**

**Classify the angle. Write acute, right, or obtuse.**

Question 5.

Answer:

Right angled

Explanation:

-the angle bounded by two lines perpendicular to each other is a right angle.

the angle measures 90°

Question 6.

Answer:

acute angle

Explanation:

An acute angle is defined as an angle that measures less than 90 degrees

Question 7.

Answer:

obtuse angle.

Explanation:

an angle that measures more than 90 degrees and less than 180 degrees is a obtuse angle.

Question 8.

Answer:

acute angle

Explanation:

An acute angle is defined as an angle that measures less than 90 degrees