Question

13. In the below figure, ZEBC = 115º and LDAB = 100°. Find ZACB.
E
B115
100°
무
A​

Answer 1

Step-by-step explanation:

Given : angle EBC = 115°

angle DAB = 100°

To find : angle ACB

Proof:

angle DAB + angle BAC = 180° ( linear pair )

100° + angle BAC = 180°

angle BAC = 180° - 100°

= 80°

Similarly,

angle CBA + angle EBC = 180° ( linear pair)

angle CBA + 115° = 180°

angle CBA = 180° - 115°

angle CBA = 65°

By Angle Sum Property of Triangle

angle ACB + angle CBA + angle BAC = 180°

angle ACB + 65° + 80° = 180°

angle ACB = 180° - 140°

• angle ACB = 40°

hope it helps you!!

And if it did don't forget to mark me brainliest cause it took me a lot of time to write the answer like this.