Lesson 4
In this lesson we learned about special right triangles. We learned about the 45°-45°-45° triangle theorem and the 30°-60°-90° triangle theorem.
The 45°-45°-90° triangle theorem states that in a 45°-45°-90° triangle, both legs are congruent, and the length of the hypotenuse is the length of a leg times the square root of 2.
The 30°-60°-90° triangle theorem states that in a 30°-60°-90° triangle, the length of the hypotenuse is 2 times the length of the shorter leg, and the length of the longer leg is the length of the shorter leg times the square root of 3.
The 45°-45°-90° triangle theorem states that in a 45°-45°-90° triangle, both legs are congruent, and the length of the hypotenuse is the length of a leg times the square root of 2.
The 30°-60°-90° triangle theorem states that in a 30°-60°-90° triangle, the length of the hypotenuse is 2 times the length of the shorter leg, and the length of the longer leg is the length of the shorter leg times the square root of 3.