18.) Two angles of a triangle are in the ratio 4:5. If the sum of these angles is equal to the third
angle, find the angles of the triangle.
Answers
Answered by
74
hi
let the two angle be 4x and 5x
then third is 9x
4x+5x+9x=180
x=10
angle 1=40
angle 2=50
angle 3=90
udai338:
why you add the first and second angle
Answered by
52
Answer:
Let the measure of two angles be 4x and 5x and the third one is ( 4x + 5x ).
We know that ;
Sum of angles of triangle = 180°
⇒ 4x + 5x + 4x + 5x = 180
⇒ 18x = 180
⇒ x = 180/18
⇒ x = 10
Therefore, the angles are ;
- 4x = 4 * 10 = 40°
- 5x = 5 * 10 = 50°
- 9x = 9 * 10 = 90°
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