Question

one of the angle of a triangle is equal to the sum of the other two angle. if the ratio of the other two angle is 4:5 find the angle of the triangle

Answer 1

4x+5x+4x+5x=180°
18x=180°
x=180°/18= 10°
so, by putting x=10°
4x=4×10°=40°
5x=5×10° =50°
so one angle = 40°
second angle =50°
third angle= 40°+50° =90°

CHECK :- 40°+ 50°+90° = 180°
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Answer 2

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heyy!!
solution:
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sum of all angle of triangle=180

●sum of two angle is equal to the one angle

=>4x+5x+4x+5x=180

=>18x=180

=>x=10


angles are:( 4x=40),(5x=50),and 50+40=90


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