Question

12.2 :
F] the angles of a triangle are in the ratio of 1: 4: 5. find all the angles .

Answer 1

Answer:

ANGLE 1 = 80

ANGLE 2 = 320

ANGLE 3 = 400

Answer 2

Answer: 18, 72 and 90

Step-by-step explanation: So a triangle's angle sum property is 180 ° so

we can assume all three angles as 1x,4x and 5x

so ∴ we can say that

⇒ x + 4x + 5x = 180

⇒ 10x = 180

⇒ x = 180/10

⇒ x = 18

so ∴ 1st angle = 18

        2nd angle = 18 × 4 = 72

        3rd angle = 18 × 5 = 90

i hope this helped you