today we will define right angles, obtuse angles, and acute angles

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Today we will define right angles, obtuse angles, and acute angles.

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Page 1: Today we will define right angles, obtuse angles, and acute angles

Today we will define right angles, obtuse angles, and acute angles.

Page 2: Today we will define right angles, obtuse angles, and acute angles

Think Pair Share

What do you call the point where two lines meet?

Corner

Page 3: Today we will define right angles, obtuse angles, and acute angles

Degrees: Measuring Angles

We measure the size of an angle (corner) using degrees. Example: Here are some examples of angles and their degree measurements.

Page 4: Today we will define right angles, obtuse angles, and acute angles

Acute Angles

An acute angle is an angle measuring between 0 and 90 degrees.

Example:

Page 5: Today we will define right angles, obtuse angles, and acute angles

Obtuse Angles

An obtuse angle is an angle measuring between 90 and 180 degrees.

Example:

Page 6: Today we will define right angles, obtuse angles, and acute angles

Right AnglesA right angle is an angle measuring EXACTLY 90 degrees.

Examples:

Page 7: Today we will define right angles, obtuse angles, and acute angles

On your whiteboards….

Is this angle acute, right, or obtuse?

Page 8: Today we will define right angles, obtuse angles, and acute angles

On your whiteboards….

Is this angle acute, right, or obtuse?

Page 9: Today we will define right angles, obtuse angles, and acute angles

On your whiteboards….

Is this angle acute, right, or obtuse?

Page 10: Today we will define right angles, obtuse angles, and acute angles

On your whiteboards….

Is this angle acute, right, or obtuse?

Page 11: Today we will define right angles, obtuse angles, and acute angles

On your whiteboards….

Is this angle acute, right, or obtuse?

Page 12: Today we will define right angles, obtuse angles, and acute angles

On your whiteboards….

Is this angle acute, right, or obtuse?

Page 13: Today we will define right angles, obtuse angles, and acute angles

On your whiteboards….

Is this angle acute, right, or obtuse?

Page 14: Today we will define right angles, obtuse angles, and acute angles

On your whiteboards….

Is this angle acute, right, or obtuse?

Page 15: Today we will define right angles, obtuse angles, and acute angles

What did we learn today?

What is a right angle? What is an obtuse angle? What is an acute angle?

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