Question

c. ∆ ABC has its angles in the ratio 1:3:5. Find the measurement of the greatest angle in ∆ ABC.
​

Answer 1

Answer:

let the multiplying factor be x

sum of angles of a triangle is 180

1x+3x+5x =180

9x =180

x =180÷9

=20

20, 3*20=60, 5*20=100

measurement of the greatest angle in ∆ ABC is 100.

Answer 2

Answer:

Good evening.

Step-by-step explanation:

The ratio 1:3:5 by doubling each number is the same as 2:6:10 and the big one 10 is 10/(2+6+10) = 10/18 of the total, so multiplying top and bottom by 10 gives 100/180, so the biggest angle is 100° since the sum of all angles must be 180°.

Think this is helpful.

Thanks