For safety reasons, a ladder should make a 15∘ angle with a wall. Is the ladder shown leaning at a safe angle? Explain. The space between the ladder and the wall is a triangle, and the sum of all of the angles inside a triangle is 180∘. The angle created by the ground and the wall is ∘. Because a straight angle is ∘, the acute angle created by the ladder and the ground is ∘. Since the sum of the three angles inside the triangle is 180∘, the angle formed by the ladder and the wall is ∘ which a safe angle. 9 of 10 answered need help?Check answer Next