We included HMH Into Math Grade 4 Answer Key PDF Module 13 Review to make students experts in learning maths.

Vocabulary

Choose the correct term from the Vocabulary box to complete the sentence.

Vocabulary
endpoint
line
line segment
point
ray

Question 1.
An ________ is the starting point for a ray.
End point
Explanation:

F is a starting point of ray, G is the point where it continues.

Question 2.
A ____________ is a straight path that continues without end in both directions.
Line
Explanation:
A line is a starting point without end points.

Question 3.
An exact location in space is a __________.
Point
Explanation:
Point shows the exact position in a path.

Concepts and Skills

Question 4.
Use a protractor to draw an acute angle.
60° acute angle

Explanation:
Draw a straight line using ruler.
Place the center of your protractor on one end of the line.
Count from zero degree and mark a dot at the required angle.
Remove the protractor and join the lines.
Know mark the angles.

Use Tools Draw and label an example of each figure. Name the strategy or tool you will use to solve the problem and explain your choice.

Question 5.
$$\over left righ tarrow{M N}$$

Explanation:
A Line is a straight path that continues without end in both directions.

Question 6.
$$\overrightarrow{T E}$$

Explanation:
Ray is a part of line it has one end point and continues without end in one direction.

Question 7.

Jacob drew the figure shown. Select all of the statements that are true.

(A) x is the measure of an acute angle.
(B) To find the value of x, Jacob can subtract 85° from 180?
(C) x = 85°.
(D) x = 95°.
Option (B & D) are true statements.
Explanation:
A straight line is of 180°.
Angle greater than 90° is known as acute angle.

Question 8.
Compare the angles. Then use the letters to order the angles from greatest to least.

B > C > A
Explanation:
To compare the angles from greatest to least
B > C > A
angle less than 90° is obtuse angle.
angle less than 90° is acute angle.
B = Obtuse angle ,150°
C = Acute angle, 80°
A = Acute angle, 30°

Question 9.

m∠ABC = _________
m∠ABC = 60°
Explanation:
Sum of the above given angles,
m∠ABC = m∠ABD  + m∠DBC
m∠ABC = 35° + 25° = 60°

Question 10.
Use a protractor to draw a 140° angle.
140°

Explanation:
Draw a straight line using ruler.
Place the center of your protractor on one end of the line.
Count from zero degree and mark a dot at the required angle.
Remove the protractor and join the lines.
Know mark the angles.

Write an equation to find the measure of the unknown angle.

Question 11.

45°
Explanation
Let the unknown angle be x
Given angle 110° and 65°
x = 110° – 65° = 45°

Question 12.

Explanation
Let the unknown angle be x
Given angle 80° and 35°
x = 80° + 35° = 115°

Question 13.
Write the measure of the shaded angle in degrees.