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.