Texas Math Models

Try “number line” or “4.5D”

Right angles

and perpendicular sides

G3–4

Does any corner make a square corner? That is a right angle.HAS RIGHT ANGLESrectangle4 of themright trapezoid2 of themHAS NONErhombus0triangle0two sides meeting at a right angle are perpendicularequal sides do not make square cornersperpendicular and right angle are the same test, said two ways

How this one works

How

check each corner against a square corner, like the corner of a page.

Best when

the question says right angle OR perpendicular. Same test.

The same problem, other ways