Finding a Shape by Its Angles Worksheet Download
This worksheet shows four shapes and asks which one contains at least one acute, one obtuse, and one right angle all together. Where other sheets ask students to count the angles inside a single shape, this one asks them to pick a shape out of four by the mix of angles it holds. The three wrong shapes are each missing a different one of the three kinds, so no single check disposes of them all and every shape has to be looked at. All four come from different families of shape, and every angle on the page sits a clear margin away from square, so a right angle can be told from a near-right one by eye rather than by measuring.
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Finding a Shape by Its Angles
Students are given a number of acute, right or obtuse angles and choose which of four shapes has them.
About this worksheet
Students are given a number of acute, right or obtuse angles and choose which of four shapes has them.
Student objectives
- Classify the angles inside a polygon as acute, right or obtuse
- Judge a whole shape by the mix of angles it contains
- Recognize that a shape can hold all three kinds of angle at once
- Rule out a shape by finding the kind of angle it is missing
Everyday practice
- Spot the square corners on a picture frame and the sharper ones on a roof
- Check whether a shelf bracket makes a true right angle
- Describe the corners of a road sign as sharp, square or wide
- Look at a slice of pizza and decide whether its point is sharper than a square corner