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.

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.
Line segment

Question 2.
A ____________ forms a square corner.
Right angle.

Question 3.
An ____________ is greater than a right angle and less than a straight angle.
Obtuse angle.

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

Texas Go Math Grade 4 Module 13 Assessment Answer Key Question 4.
The two-dimensional figure that has one endpoint is a ____________.
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 ____________.
Straight angle.

Concepts and Skills

Use Figure A for 6 – 11.

Question 6.
Name a ray.
Ray EF

Question 7.
Name an acute angle.
âˆ AGD

Question 8.
Name a point.
âˆ B is a point

Question 9.
Name a line segment.
AB is a line segment

Question 10.
Name a pair of perpendicular lines.
EBF is perpendicular to AGB

Name an obtuse angle.
âˆ AGC is an obtuse angle.

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

Classify each triangle. Write acute, right or obtuse.

Question 12.

Obtuse angle

Explanation:
Obtuse angles measure more than 90 degrees.

Question 13.

Right angle

Explanation:
A right angle measures 90 degrees.

Question 14.

Acute angle.

Explanation:
The angle measures less than 90 degrees.

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
1 line of symmetry

Question 16.
Which figure has 2 pairs of sides that appear to be parallel?
(A)

(B)

(C)

(D)

Option A

Which quadrilateral can have 2 pairs of parallel sides, all sides with equal length, and no right angles?
(A) square
(B) rhombus
(C) rectangle
(D) trapezoid
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