Question

Maths Pre Board Question!!!!
solve it fast​

Answer 1

Answer:

(b) 60/13

Explanation:

Given:

∠A = 90° ———————————— 1

AB = 5cm ———————————— 2

AC = 12cm ———————————— 3

AD ⊥ BC ———————————— 4

Area of ️ BAC = ½ × AC × AB

= ½ × 12 × 5

= 6 × 5

= 30cm² ———————————— 5

By Pythagoras Theorem and from equation 1,

BC² = AB² + AC²

BC² = (5)² + (12)²

BC² = 25 + 144 = 169

BC = √(169) = 13cm ———————————— 6

Using equations 5 and 6,

Area of ️ BAC = ½ × BC × AD

= ½ × 13 × AD = 30

13/2 × AD = 30

(b) AD = 30 × 2/13 = 60/13