Naming the Sides
Part of the Right-Triangle Trigonometry section of Coddy's Trigonometry journey. Lesson 2 of 46.
In a right triangle, the sides get their names from the angle you look from.
- The hypotenuse is across from the square corner, the 90° angle. It is always the longest side.
- The opposite side is across from your angle. It does not touch your angle.
- The adjacent side touches your angle, but it is not the hypotenuse.
Look from the 37° angle at the tip of the shadow. The tree is opposite and the shadow is adjacent. Look from another corner and these two names change. The hypotenuse does not change.
Challenge
Now θ is the angle at the top of the tree, between the tree and the sun's ray. Tap the side opposite θ.
Then press Check.
Try it yourself
Find the right part on the figure