Benchmark STAAR Review: Part 2 2/8

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Complete the area model to represent the equation 23 × 15 = 345.

Move the correct number to each box. Each number may be used more than once. Not all numbers will be used.

a

b

c

5

10

20

The triangle is ​ ​ (a)   because it has ​ ​ (b)  

• a right triangle
• a right angle and two acute angles
• an obtuse triangle
• an acute triangle
• three acute angles
• two acute angles and one acute angle

Mathematical Equivalence

ON

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