ALEX Classroom Resources

   View Standards     Standard(s): [MA2019] (4) 26 :

26. Decompose an angle into non-overlapping parts to demonstrate that the angle measure of the whole is the sum of the angle measures of the parts.

a. Solve addition and subtraction problems on a diagram to find unknown angles in real-world or mathematical problems.

In Topic C, students use concrete examples to discover the additive nature of angle measurement.

Students will:

• decompose angles using pattern blocks.
• use the addition of adjacent angle measures to solve problems using a symbol for the unknown angle measure.
• use the addition of adjacent angle measures to solve problems using a symbol for the unknown angle measure.