7b ÷ 12 = 4.2 What is b?
2 answers:
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Answer:
Step-by-step explanation:
In the figure given:
∠ABC = 93°
∠BAC = 31°
∠CDE = 60°
To find ∠CED and ∠ACD.
Solution:
In triangle ABC, we are given two vertex angles. We can find the third angle as angle sum of triangle = 180°.
∠ABC = 93° , ∠BAC = 31°
∠BCA=
∠BCA = 56°
[Supplementary angles forming a linear pair]
(Answer)
In triangle CDE:
[Exterior angle theorem :Exterior angle of a triangle is equal to sum of opposite interior angles ]
(Answer)