Digital SAT Math
Lesson Plan
Special right triangles: 45-45-90 and 30-60-90
Goals / Objectives
State the side ratios for 45-45-90 triangles (1 : 1 : sqrt(2)) and 30-60-90 triangles (1 : sqrt(3) : 2)
Derive the 45-45-90 ratio by cutting a unit square along its diagonal
Derive the 30-60-90 ratio by bisecting an equilateral triangle
Find any missing side of a special right triangle given one side
Solve SAT-style problems that embed special right triangles in larger figures
Standards
"Solve problems in a variety of contexts using: ... • properties of special right triangles."
Academic Vocabulary
Not in our source material
Materials
Enrichment
This lesson’s brief has no Differentiation
Accommodations
Not in our source material
Anticipatory Set / Bell Work
Modeling
Check for Understanding
This lesson’s brief has no Formative Assessment or Assessment Ideas
Guided Practice
Independent Practice
Homework
Pacing
This lesson’s brief has no Pacing