Geometry › Triangle area

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Discover a formula for the area of any triangle
CCSS.MATH.CONTENT.6.G.A.1
Find the area of right triangles, other triangles, special quadrilaterals, and polygons by composing into rectangles or decomposing into triangles and other shapes; apply these techniques in the context of solving real-world and mathematical problems.

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Lines and angles
Related angles
Triangles
Triangle congruence and similarity
Polygons and quadrilaterals
Area of polygons
Intro to area
Measuring how much space is inside a shape
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Rectangle area
Discover the formula for the area of a rectangle
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Parallelogram area
Discover the formula for the area of a parallelogram
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Triangle area
Discover a formula for the area of any triangle
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Trapezoid area
Discover the formula for the area of a trapezoid
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Rhombus area
Find a rhombus' area using its diagonals
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The Pythagorean theorem
Circles, ellipses, and their areas
Angles in circles
Lines in circles
Volume
Surface area
Transformations
Geometric optics