Obtuse angle An obtuse angle is an angle that measures more than 90 degrees (90°) but less than 180 degrees (180°). An obtuse angle looks like this You can draw angles here with Geogebra https://www.geogebra.org/m/scavsujt […]

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## Obtuse triangle

Obtuse triangle An obtuse triangle or obtuse-angled triangle is a type of triangle that has one obtuse (greater than 90°) angle. As the sum of all the interior angles of a triangle is 180°, an obtuse-angled triangle has one obtuse angle and two acute angles (less than 90° each). An obtuse triangle is like this: […]

## Isosceles triangle

Isosceles triangle An isosceles triangle is a triangle with two sides of equal length. The two equal sides are called the legs and the third side is called the base. The angles at the base are called the base angles, and the angle opposite the base is called the vertex angle.Types of isosceles triangles: Isosceles […]