CPM Homework Banner

Home > A2C > Chapter 8 > Lesson 8.2.2 > Problem 8-133


Too Tall Thomas has put Rodney's book bag on the snack-shack roof. Rodney goes to borrow a ladder from the school custodian. The tallest ladder available is 10 feet long and the roof is 9 feet from the ground. Rodney places the ladder's tip at the edge of the roof. The ladder is unsafe if the angle it makes with the ground is more than 60°. Is this a safe situation? Justify your conclusion. Homework Help ✎

Imagine a right triangle where the wall and the ground are legs and the ladder is the hypotenuse.
Use the trigonometric relationships to find the angle between the ladder and the ground.