Which of the following are quadrilaterals (select all that apply)?

trapezoids
rectangles
polygons
squares
parallelograms

 The answer is trapezoids, rectangles, squares and parallelograms.

Step-by-step explanation:  We are given four options out of which we are to select those which are quadrilaterals.

We know that the quadrilaterals are polygons having four sides.

Trapezoids, rectangles, squares and parallelograms are quadrilaterals having four sides, so theses are the correct answers.

Since a polygon may have any number of sides greater than or equal to 3, so this option is incorrect.

Thus, the correct answer is Trapezoids, rectangles, squares and parallelograms.

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

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step-by-step explanation:

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