Question

solve what you can please​

Answer 1

Answer:

8. right angled triangle

9. 120 degrees

10. 96

11. square root of 768

Step-by-step explanation:

8.

4x + 5x + 9x = 180

18x = 180

x = 10

4x = 40

5x = 50

9x = 90

this is a right angled triangle as one of its angles are 90 degrees

9.

we will first find BCD.

BCD = 55+25 = 80

x = BCD + 40 = 80+40 = 120

10.

$\sqrt{s(s-a)(s-b)(s-c)}$

here, s = (12+16+20)/2 = 48/2 = 24

$\sqrt{24(24-12)(24-16)(24-20)}$

$= \sqrt{24*12*8*4}$

= $\sqrt{9216}$

= 96

11.

s = 12

sides = 8

$\sqrt{12(12-8)(12-8)(12-8)}\\= \sqrt{12*4*4*4}\\= \sqrt{768}$

12.