Question

6 In the given figure, AACB is a right angled triangle at C and CD LAB
7. Two acute angles of a right angled triangle are equal. Find the two angles,
&. In the given five sided closed figure, find ZEAB + ZABC + ZBCD + ZCDE + ZDEA,
If 2B - 40°, then find :
(1) ZBAC
(ii) ZACD
(ii) ZBCD
A
40°
D
B
A
E
9. The angles of a triangle are in the ratio 5: 4: 3. Find the measure of each angle.
10. In AABC, 2ZA - 32B - 62C. Calculate ZA, ZB and C.
(Hint: 2.4A = 32B = A: B = 3 : 2 and 32B = 64C = B: AC = 6:3 = 2 : 1 thus, ZA: B
3:2:11
11. The angles of a triangle are (x + 21), x° and (2x - 45)". Find the value of x.
EXTERIOR AND INTERIOR OPPOSITE ANGLES OF A TRIANGLE
Let the side of
AABC her​

Answer 1

Answer:

here, 7 answer is 45 because

let angle c = 90

then , a+b+c=180

a+b=180-90

a+b=90

a and b are equal, so we can take

2a=90

a=45.

9. given ratio 5:4:3

let the angle be x

5x:4x:3x

the sum of angles of a triangle = 180

so, 5x+4x+3x=180

12x=180

x=180/12

x=15

5x=5(15)=75

4x=4(15)=60

3x=3(15)=45.

11. given angles are

(x+21) , x , (2x-45)

sum of angles of a triangle are 180

x + 21 + x +2x - 45 = 180

4x - 24 = 180

4x = 180 + 24

4x = 204

x = 204/4

x = 51.

I am sorry but i dont know the other solutions . So i cant help it.