Triangles, Degrees, Angles, and Formulas
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acute triangle
all angles are acute
Area of a triangle
1/2 x base x height
Area of a trapezoid
1/2 x height(B1 + B2)
Degrees in a triangle
180 degrees
Right triangle
A 90 degree angle is present in the triangle.
Scalene Triangle
A triangle that has no equal sides
Isosceles Triangle
A triangle with 2 sides of equal length
Equilateral Triangle
A triangle with all sides of equal length
Area of a rectangle/Square
Length x Width
Obtuse triangle
One angle in the triangle is greater than 90 degrees.
