Question

b) Given angles x=120° and y= 60° check if x +y is supplementary or complementary
Three anales which add untn 1800 are in the ratio 2:3:7 find them.​

Answer 1

Answer:

30,45 and 105

Step-by-step explanation:

Ratio of three angles = 2 : 3 : 7

Let first angle be = 2x

Second angle = 3x

And third angle = 7x

∴ 2x + 3x + 7x = 180°

⇒ 12x = 180° ⇒ x = 180°/12 = 15°

∴ First angle = 2x = 2 × 15° = 30°

Second angle = 3x = 3 × 15° = 45°

and third angle = 7x = 7 × 15° = 105°

Hence, angles are 30°, 45° and 105°

Answer 2

Step-by-step explanation:

if the sum of angles is 180° then it is a supplementary angle

if the sum of angles is 90° then it is a complementary angle

therefore ,

120+60=180 °

then it is a supplementary angle ANS

(2) the sum of angles of every triangle is 180

= 2:3:7

= 2+3+7= 12

= 180÷12= 15

then the angles are

15×2=30Ans

15×3= 45Ans

15× 7= 105Ans

IF YOU WANT TO CHECK THE ANSWER THEN

30+45+105= 180°