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7.14 Isosceles Trapezoid Base Angles Theorem If a trapezoid is isosceles, then each pair of base angles is congruent. If trapezoid ABCD is isosceles, then ∠ A ≅ ∠ D
Each trapezoid is part of an isosceles triangle whose base angles are the acute base angles of the trapezoid.The isosceles triangle has a vertex angle that is half as large as one of the 20 angles at the center of the ceiling.
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If a trapezoid has a pair of congruent base angles, then it is an isosceles trapezoid. If ∠ A ≅ ∠ D (or if ∠ B ≅ ∠ C ), then trapezoid ABCD is isosceles.
- Area of Isosceles Trapezoid
- Perimeter of Isosceles Trapezoid
- Related Articles on Isosceles Trapezoid
To find the area of the isosceles trapezoid we have to add the base sides or parallel sides and divide it by 2 and then multiply the result with height. Area of Isosceles Trapezoid = (sum of parallel sides ÷ 2) × h
To find the perimeter of the isosceles trapezoid we have to add all the sides of the isosceles trapezoid. Perimeter of Isosceles Trapezoid = sum of all sides
Check out the interesting topics to learn more about the Isosceles Trapezoid. 1. Trapezoid Formula 2. Area of Trapezoid 3. Perimeter of a Trapezoid Formula 4. Isosceles Trapezoid Calculator
A trapezoid has two pairs of base angles. For instance, in trapezoid ABCD, TMD and TMC are one pair of base angles. The other pair is TMA and TMB. The nonparallel sides are the legs of the trapezoid. If the legs of a trapezoid are congruent, then the trapezoid is an isosceles trapezoid.
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Use properties of trapezoids. Key Words • trapezoid • bases, legs, and base angles of a trapezoid • isosceles trapezoid • midsegment of a trapezoid A is a quadrilateral with exactly one pair of parallel sides. The parallel sides are the . The nonparallel sides are the . A trapezoid has two pairs of . In trapezoid ABCD, aC and aD are one ...
