In an isosceles trapezoid ABCD
Calculate the size of angle .
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In an isosceles trapezoid ABCD
Calculate the size of angle .
To answer the question, we must know an important rule about isosceles trapezoids:
The sum of the angles that define each of the trapezoidal sides (not the bases) is equal to 180
Therefore:
∢B+∢D=180
3X+X=180
4X=180
X=45
It's important to remember that this is still not the solution, because we were asked for angle B,
Therefore:
3*45 = 135
And this is the solution!
135°
True OR False:
In all isosceles trapezoids the base Angles are equal.
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