Lines and Angles Test

Result

Lines and Angles Test - 9

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Weekly Quiz Competition

Question 1
1 / -0

What is the complementary angle of 20^o?

A
70^o

B
180^o

C
90^o

D
150^o

Solution

Complementary angles add up to 90^o. ∠PQR=20^o⇒ Its complementary angle is 90^o−20^o=70^o
Question 2
1 / -0

Observe the figure given. Compute the sum of x, y and z.

A
180^o

B
70^o

C
190^o

D
80^o

Solution

From the figure, 150−x+70−x+x=180^o ⇒ x=220^o−180^o=40^o Since AE||BD, AE||BD, y=x as they are alternate angles. In ΔBCD, ∠BDC=x (Alternate angles) 70−x+x+z=180^o ⇒ z=110^o ∴The required sum =x+y+z=40^o+40^o+110^o=190^o
Question 3
1 / -0

What do we call a 169^o angle?

A
An obtuse angle

B
An acute angle

C
A right angle

D
A zero angle
Question 4
1 / -0

What do we call an angle whose measurement is exactly equal to 0^o?

A
An obtuse angle

B
A straight angle

C
A zero angle

D
A right angle