# Math Puzzler: Triangle Sums

🔓 This is an unlocked sample! Byrdseed.TV is open for new memberships through April 30th, 2021. Join today!

### Objective

Students will create triangles in which each side adds up to the same sum.

From Prufrock Press' Advanced Common Core Math Exploration series, we introduce the Triangle Sums exploration.

### Steps

1. Using the digits 1-9, and four blanks per side, students try to sum up each side of a triangle to equal 17.
2. We break down the importance of the corner spots, then students use 1-12 and five blanks per side to sum up to the smallest sides possible.
3. We reveal the solution, then students try to predict the smallest sides of a triangle with only 3 blanks per side, then 6 and 7.
4. We discuss the pattern between the sum of all numbers and the sum of the smallest sides.

## Teachers love Byrdseed.TV!

"I am the coordinator for our district gifted program. Byrdseed.TV is one of my favorite sites and one of the best investments I have made for the program."  ~  Jeannette in California

"I love Byrdseed TV! I use it as a resource and inspiration source! Thank you so much for sharing your ideas and knowledge."  ~  Kari in Texas

"Love, love, love Byrdseed TV... I used many ideas and lessons this year. The kids loved the lessons and were engaged!"  ~  Tiffany in California