Back to Prove theorems about triangles — Problem 5 · Task Set 10

Exercises: Prove Theorems About Triangles

Work through each section in order. Show your reasoning for proof-based problems.

Grade 9·21 problems·~35 min·Common Core Math - HS Geometry·standard·hsg-co-c-10

Work through problems with immediate feedback

Fluency Practice

Apply the triangle theorems directly to find missing values.

In triangle $ABC$ , $D$ is the midpoint of $\overline{AB}$ and $E$ is the midpoint of $\overline{AC}$ . If $BC = 24$ , find the length of midsegment $\overline{DE}$ .