The garden at João's house was square, with the sides measuring x. It was enlarged as follows: on one side, there was an increase of 6 m and on the other, by 3 m. In this way, the garden started to have a rectangular shape. Knowing that the difference between the new area and the old is 99m2, determine the measure of x.

i use my brain for prombles like this maybe you could try it

step-by-step explanation:

proofs involving isosceles triangles often require special consideration because an isosceles triangle has several distinct properties that do not apply to normal triangles.(more about triangle types) therefore, when you are trying to prove that two triangles are congruent, and one or both triangles, are isosceles you have a few theorems that you can use to make your life easier.

step-by-step explanation:

an isosceles triangle has two congruent sides and two congruent angles. the congruent angles are called the base angles and the other angle is known as the vertex angle. ∠bac and ∠bca are the base angles of the triangle picture on the left. the vertex angle is ∠abc

what are you trying to solve here

step-by-step explanation: