A home has a triangular backyard. The second angle of the triangle is 4º more than the first angle. The third angle is 21° more than three times the first angle. Find the angles of
the triangular yard

Step-by-step explanation:

Let the first angle be . Then, the second angle is and the third angle is .

We know that the sum of the angles in a triangle will always be . So, we want to solve the equation for x: .

Combining like terms on the left side gives .

Subtracting from both sides gives .

Dividing both sides by gives .

So, the first angle is .

The second angle is , so the second angle is .

The third angle is , so the third angle is .

So, the angles are and we're done!

The check that these angles work is left as an exercise to the reader.

the answer is (4,3)

since the rule for r0, 90º is (-y,x) and it was already applied to form the image, all you have to do is reverse the answer using this formula.

c. side angle side. u shares the same sides