Proof of Area of Obtuse Triangle

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Area of Square and Triangle

Using an obtuse triangle and half of the height to verify the formula.

Derive the formula A = 1/2 ab sin(C) for the area of a triangle by drawing an auxiliary line from a vertex perpendicular to the opposite side - Common Core: High School - Geometry

How To Find An Angle In An Acute Obtuse Triangle GRE Math, 58% OFF

Visually prove area = 1/2 (base * height) for scalene triangle. - Mathematics Stack Exchange

Area of a Triangle

Using an obtuse triangle and half of the height to verify the formula.

Proof of the Law of Sines - Math Open Reference

Write the sum of the angles of an obtuse triangle.

The Area of a Triangle as Half a Rectangle - Wolfram Demonstrations Project

Obtuse Triangles: Practice Finding Area, Worksheet, Education.com

Concept of Area: Obtuse-Angled Triangle - Half the Base

Concept of Area: Obtuse-Angled Triangle - Half the Base

Area of Triangle Using Trigonometry - MathBitsNotebook(Geo)