Question

one angel of a triangle is 78° and the other two angel are in the ratio 7:10 calculate the two unkown angles of a triangle​

Answer 1

Answer:

42° & 60°

Step-by-step explanation:

One angle = 78°

Sum of other two angles = 180° - 78° = 102°

Ratio =7:10

Let second angle be 7x

Let third angle be 10x

So,

7x + 10x = 102°

17x = 102°

x = 102° ÷ 7

x = 6

Therefore,

First angle = 78°

Second angle = (7 x 6)° = 42°

Third angle = (10 x 6)° = 60°

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