Q3, W4: February 16-19 Geometry

TeacherKristin Andreason
Subject AreaGeometry Honors
Grade Level8
Week #February 16-19
Unit of InstructionUnit 4: Right Triangles and Trigonometry
Standard(s) Taught

MAFS.912.G-SRT.3.7: Explain and use the relationship between the sine and cosine of complementary angles.

MAFS.912.G-SRT.3.8:  Use trigonometric ratios and the Pythagorean Theorem to solve right triangles in applied problems.

Learning Targets and Learning Criteria
  • calculate sine and cosine ratios for acute angles in a right triangle when given two side lengths.
  •  use a diagram of a right triangle to explain that for a pair of complementary angles A and B, the sine of angle A is equal to the cosine of angle B and the cosine of angle A is equal to the sine of angle B.
  • draw right triangles that describe real world problems and label the sides and angles with their given measures.
  • solve application problems involving right triangles, including angle of elevation and depression, navigation, and surveying.
Classroom Activities


  1. Students will log onto the Zoom session.
  2. We will use the clinometers to find the height of some items.
  3. Students will play a Special Right Triangles Swipe Out Game.


  1. Students will log onto the Zoom session.
  2. We will watch the video “Get Triggy With It”
  3. We will examine the sin and cos of complementary angles.
  4. Students will do IXL R.10.


  1. Students will log onto the Zoom session.
  2. We will review for the DIA (next Monday/Tuesday).
Assignments Due
  • IXL R.4
Additional Resources

All IEP and ESOL accommodations are provided daily.