Question

plzz ans thiss...maths​

Answer 1

Answer: ans 1. 80

Ans 2 . 30

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Step-by-step explanation:

Answer 2

Answer:

Q.12 120°

Q.13 60

Step-by-step explanation:

Q.12

We are given that,

An angle is double its supplementary,

Two angles are said to be supplementary, if they add upto 180°

Let the angle be x

then its supplementary will be 180 - x.

See,

x + 180 - x = 180

180 = 180

So, it is correct,

Now, according to the Question,

x = 2(180 - x)

x = 2 × 180 - 2 × x

x = 360 - 2x

2x + x = 360

3x = 360°

x = 360/3

x = 120°

Thus, the measure of the angle is 120°.

Q.13

We are given that,

(2/3) of a number is less than the original number by 20,

Let the number be x

so,

(2/3) of x = (2/3) × x

= (2/3)x

So,

According to the Question,

(2/3)x = x - 20

x - (2/3)x = 20

(3/3)x - (2/3)x = 20

((3 - 2)/3)x = 20

(1/3)x = 20

x/3 = 20

x = 3 × 20

x = 60

Thus, the number is 60

Hope it helped and believing you understood it........All the best.