Question

Which one is the
angle in the
semi-circle?
ii. Find AB, when A
AD = 4cm and
DB = 5cm​

Answer 1

Answer:

(1)<ADB

(2)<ADB=90°

by pythagarous theorem

check the picture

Answer 2

Answer:

(i) <ADB is the Angle in the Semi Circle.

(ii) Since, <ADB = 90° , ∆ADB is Right Triangle.

By The Pythagorean Theorem,

AD² + DB² = AB²

(4)² + (5)² = AB²

AB² = 41

:. AB = √41 cm