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Paragraph Proof Not all proofs are in two-column form, some are written in sentences in a paragraph form. Each statement has it’s reason in the same sentence. Try to fill in the blanks for this paragraph proof and then save it as Yourname_proof and e-mail it back to Mrs Varner. Proof of angles in an equilateral triangles. Given: Equilateral Triangle ABC Prove: All angles are 60 degrees. Given that Triangle ABC is equilateral, then all sides are _______. (AB = BC = CA) If AB = BC then < ____ = < ____ and if BC = CA then < _____ = <_______ because of the Isosceles Triangle Theorem. All three angles in the triangle must total ______ so m<A + m< B + m<___ = ______. By substituting all angles that are equal to < A with that expression in the previous equation, you obtain, m< A + m< A + m< A = _____. By adding the terms on the right, you obtain, 3 m<A = _____. By dividing both sides of the equation you obtain m< A = ______. Since all the angles are the same, that means that _______________________________. You are finished. Like it better than the two-column? Save and send to Mrs Varner.