Refer to our Texas Go Math Grade 4 Answer Key Pdf to score good marks in the exams. Test yourself by practicing the problems from Texas Go Math Grade 4 Module 13 Assessment Answer Key.

## Texas Go Math Grade 4 Module 13 Assessment Answer Key

**Vocabulary**

- acute angle
- line segment
- Obtuse angle
- ray
- right angle
- straight angle

**Choose the best term from the box to complete the sentence.**

Question 1.

A ____________ is part of a line between two endpoints.

Answer:

Line segment

Question 2.

A ____________ forms a square corner.

Answer:

Right angle.

Question 3.

An ____________ is greater than a right angle and less than a straight angle.

Answer:

Obtuse angle.

Explanation:

Angles larger than a right angle and smaller than a straight angle (between 90° and 180°) are called obtuse angles.

Question 4.

The two-dimensional figure that has one endpoint is a ____________.

Answer:

Ray

Explanation:

A 2-dimensional figure that has one endpoint and goes without end in one direction. A ray is shown with an endpoint and an arrow at one end.

Question 5.

An angle that forms a line is called a ____________.

Answer:

Straight angle.

**Concepts and Skills**

**Use Figure A for 6 – 11.**

Question 6.

Name a ray.

Answer:

Ray EF

Question 7.

Name an acute angle.

Answer:

∠AGD

Question 8.

Name a point.

Answer:

∠B is a point

Question 9.

Name a line segment.

Answer:

AB is a line segment

Question 10.

Name a pair of perpendicular lines.

Answer:

EBF is perpendicular to AGB

Question 11.

Name an obtuse angle.

Answer:

∠AGC is an obtuse angle.

Explanation:

By observing from the given figure the ∠AGC is an obtuse angle that measures more than 90 degrees.

**Classify each triangle. Write acute, right or obtuse.**

Question 12.

Answer:

Obtuse angle

Explanation:

Obtuse angles measure more than 90 degrees.

Question 13.

Answer:

Right angle

Explanation:

A right angle measures 90 degrees.

Question 14.

Answer:

Acute angle.

Explanation:

The angle measures less than 90 degrees.

**Fill in the bubble completely to show your answer.**

Question 15.

Which describes the figure?

(A) zero lines of symmetry

(B) 1 line of symmetry

(C) 2 lines of symmetry

(D) more than 2 lines of symmetry

Answer:

1 line of symmetry

Question 16.

Which figure has 2 pairs of sides that appear to be parallel?

(A)

(B)

(C)

(D)

Answer:

Option A

Question 17.

Which quadrilateral can have 2 pairs of parallel sides, all side with equal length, and no right angles?

(A) square

(B) rhombus

(C) rectangle

(D) trapezoid

Answer:

Rhombus

Explanation:

A parallelogram with 4 sides with equal length and no right angles is a rhombus.

Question 18.

Which names the figure correctly?

(A) line FE

(B) ray FE

(C) angle FE

(D) ray EF

Answer:

Ray FE

Explanation:

The name of the figure we can write correctly is ray FE.