Question

please ans 3 questions​

Answer 1

Answer:

H²=l²+b²

b=√(h²-l²)

b=√(15²-12²)

b=√(225-144)

b=√81

b=9cm

Answer 2

Step-by-step explanation:

By Pythagoras theorem -

a*a + 12*12=15*15

a square + 144=225

a square = 225 - 144

a square = 81

a = underoot 81

a = 9