Question

29)PQR is a triangle right angled at P.If PQ=10cm and PR=24 cm,find QR. 30) Using laws of exponents,simplify and write the answer in exponential form. 1) 3²x34x3'.​

Answer 1

Answer:

By Pythagoras theorem :-

(hypotenuse)^2 = (base)^2 + (height)^2

$QR = \sqrt{10^{2} + 24^{2}} \\ QR = \sqrt{100 + 576} = 26 cm$

QR = 26 cm

30)

$3^{2} \times 3^{4} \times {3}^{1} = 3^{2 + 4 + 1} = 3 {}^{7}$

3^7 = 2187