Area of triangles (practice) | Khan Academy
Practice finding the area of right, acute, and obtuse triangles.
Area of triangles (article) | Khan Academy
Practice problem 1 What is the area of the triangle? Drag the dot to help you remember the formula.
Area of a triangle (video) | Plane figures | Khan Academy
The area of a rectangle and a parallelogram is found by multiplying the base by the height. For a triangle, the area is half of a parallelogram's, so it's calculated by multiplying the base by the …
Area and perimeter | Geometry (all content) | Math - Khan Academy
Area and perimeter help us measure the size of 2D shapes. We’ll start with the area and perimeter of rectangles. From there, we’ll tackle trickier shapes, such as triangles and circles.
Trig challenge problem: area of a triangle - Khan Academy
Sal solves a very complicated geometrical trig problem that appeared as problem 11 in the 2003 AIME II exam.
Area of triangles (article) | Plane figures | Khan Academy
Practice problem 1 What is the area of the triangle? Drag the dot to help you remember the formula.
Area of triangles (article) | Geometry | Khan Academy
Practice problem 1 What is the area of the triangle? Drag the dot to help you remember the formula.
Area of triangle proof (video) | Khan Academy
Let's see if we can somehow, either construct this out of right triangles, or maybe out a right triangle of this to make it into another right triangle. And the easiest way to do that is, we could …
Area of right triangles (practice) | Khan Academy
Find the area of right trianglesWelcome to Khan Academy! So we can give you the right tools, let us know if you're a...
Triangle missing side example (video) | Khan Academy
Learn how to find a missing piece using just the area and height. Apply this knowledge to solve puzzles and explore the magic hidden in these three-sided shapes.