# Geometry

Khan Academy Course , Prof. Salman Khan

418 students enrolled

# Overview

Contents:
introduction to angles - Angles - Angles formed between transversals and parralel lines - Angles of parallel lines - The Angle Game - Similar triangles - Area and Perimeter - Circles: Radius, Diameter and Circumference - Area of a circle - The Pythagorean Theorem

45-45-90 Triangles - Intro to 30-60-90 Triangles - 30-60-90 Triangles II - Heron's Formula the Proof of Heron's Formula - An inscribed angle is half of a central angle that subtends the same arc - Area of Inscribed Equilateral Triangle (some basic trig used) - Right Triangles Inscribed in Circles (Proof) - Area of Diagonal Generated Triangles of Rectangle are Equal

### Lecture 20: Part 2 of the Proof of Herons Formula

Up Next
• 2x
• 1.5x
• 1x
• 0.5x
• 0.25x
COPY
PRIVATE CONTENT
OK
0:00
0 (0 Ratings)

# Lecture Details

Showing that the expression in part 1 is identical to Herons Formula

0 Rates
1
0%
0
2
0%
0
3
0%
0
4
0%
0
5
0%
0