Practice the problems of Math in Focus Grade 7 Workbook Answer Key Chapter 6 Angle Properties and Straight Lines to score better marks in the exam.

## Math in Focus Grade 7 Course 2 B Chapter 6 Answer Key Angle Properties and Straight Lines

### Math in Focus Grade 7 Chapter 6 Quick Check Answer Key

**Tell whether each angle is an acute, right, obtuse, or straight angle.**

Question 1.

Answer:

Right angle triangle.

Explanation:

A right-angled triangle is a triangle with one of the angles as 90 degrees.

Question 2.

Answer:

Acute angle triangle.

Explanation:

An acute-angled triangle is a type of triangle in which all the three internal angles of the triangle measures less than 90°.

Question 3.

Answer:

90° < 154° < 180° We have

The given angle is obtuse because Its measure is greater than 90°, but Less than 180°.

obtuse

Question 4.

Answer:

straight angle.

Explanation:

The 180-degree angle is known as a straight angle. The sides of the angle are opposite to each other and they make a straight angle.

Question 5.

m∠w = 86°

Answer:

Acute angle

Explanation:

Question 6.

m∠y = 90°

Answer:

Right angle triangle.

Explanation:

**Identify each pair of parallel line segments.**

Question 7.

Answer:

RS**∥**UT

Explanation:

The lines will not meet each other at any point in the given figure. Hence parallel line will never intersect.

Question 8.

Answer:

WX**∥**ZY

Explanation:

The lines that do not intersect or meet each other at any point in a plane. Parallel lines will never intersect.

**Identify each pair of perpendicular line segments.**

Question 9.

ABCD is a rectangle.

Answer:

There are four right angles, and 2 pairs of perpendicular lines.

Explanation:

A rectangle has lines that are perpendicular to two other lines and it also has four right angles.

Question 10.

Answer:

The given figure is a right-angle triangle and has two perpendicular lines.

Explanation:

A triangle has three sides and three angles. Only one type of triangle is a right-angle triangle that has two perpendicular line segments.

Question 11.

Answer:

The given figure has two perpendicular line segments.

Explanation:

Perpendicular lines are lines, segments that intersect to form right angles.