Question

in triangle ABC, angleA=×+60°,angleB=×+78°,angleC=×°, find ×​

Answer 1

Answer:

the value of x 14 in the ABC

Answer 2

Answer:

sum of all angles of a triangle is 180⁰.

therefore, angle A + angle B + angle C = 180⁰

( x + 60⁰) + ( x+78⁰ ) + x⁰ = 180⁰

=> x + 60⁰ + x + 78⁰ + x = 180⁰

=> 3x + 138⁰ = 180⁰

=> 3x = 180 - 138

=> 3x = 42⁰

=> x = 42 ÷ 3

=> x = 14⁰

angle A = ( x + 60 ) = 14 + 60 = 74⁰

angle B = ( x + 78 ) = 14 + 78 = 92⁰

angle C = x = 14⁰

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