Question

Can u guys help me with these two problems?? for the first one I got 76 ,but I don't think is right.

also for the second I got 69 ...​

Answer 1

See below

Explanation:

15)

In the right-angle triangle, once one of the angles is 44º, then, the unknown angle is
`x`.

`180 = 44 + 90 + x`

`180 = 134 + x`

`x= 46`

The angle
`y` of the other triangle plus the angle
`x` of the right-angle triangle is equal to 90º, therefore they are complementary angles.

So,

`90 = x + y`

`90 = 46 + y`

`y=44`

To find ?, we have

`180 = 58 + 44 +?`

`180 = 58 + 44 +?`

`? =78`

16)

The sum of the internal angles of the triangle with angles 50º and 25º is equal to 180º, therefore, the other angle is

`180 = x + 50 + 25\\180 = x+ 75\\x=105`

Once the angles are opposite, they are the same. For the triangle with the 36º angle, we have

`180 = 36 + 105 + y`

`180 = 141+ y`

`y=39`

`?=39`