Digital SAT Math
Lesson Plan
Special right triangles: 45-45-90 and 30-60-90
Goals / Objectives
Find any missing side of a 45-45-90 or 30-60-90 triangle given one side
Match each side to its place in the ratio: 1 : 1 : sqrt(2) with sqrt(2) on the hypotenuse; 1 : sqrt(3) : 2 with the short leg opposite 30 degrees and the long leg opposite 60 degrees
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
Identify a special right triangle embedded in a larger figure (square, equilateral triangle, rectangle, regular hexagon) and use it to find a length
Standards
"Solve problems in a variety of contexts using: ... • properties of special right triangles."
Academic Vocabulary
Not in our source material
Materials
Remediation
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