Can someone please professionally explain the math question shown on the image. (Not just answer the question) Step by step. I will mark as brainliest!

Step-by-step explanation:

Area of a triangle is always 180 degrees...

In this triangle we have two values given, lets make an equation & solve it:

To check if you have the right answer, add all the angles to get 180:

Therefore, x = 65

I hope this help :)

the answer is a

step-by-step explanation:

because if you put 1 in to the square root of x it equals 300.

step-by-step explanation:

given perimeter: 28cm

length: 9cm

atp,

2(l+w)=p of the reactangle

2(9+x)=28

18+2x=28

2x=28-18

x=10/2

x=5

therefore width is 5 cm