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ANGLE. A FIGURE FORMED BY TWO NONCOLLINEAR RAYS WITH A COMMON ENDPOINT. ANGLE. The TWO NONCOLLINEAR RAYS ( ray BP & ray BC ) are the SIDES of an angle. ANGLE. The point where the rays intersect is called the VERTEX of an angle. ANGLE MNEMONIC. S - Sides are 2 non-collinear rays .
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ANGLE • A FIGURE FORMED BY TWO NONCOLLINEAR RAYS WITH A COMMON ENDPOINT.
ANGLE • The TWO NONCOLLINEAR RAYS (ray BP & ray BC) are the SIDES of an angle.
ANGLE • The point where the rays intersect is called the VERTEX of an angle.
ANGLE MNEMONIC • S- Sides are 2 non-collinear rays. • E- Endpoint is also called vertex. • R- Rays are the 2 sides. • V- Vertex is the common endpoint.
AN ANGLE SEPARATES A PLANE INTO 3 PARTS • INTERIOR ANGLE- point D • EXTERIOR ANGLE – point H • THE ANGLE ITSELF P, A, W,C ●H ●D
An angle is named by: • USING • 3 POINTS. • EXAMPLE: • ABC orCBA • PBW or WBP
An angle is named by: 2. BY THE VERTEX ALONE. EXAMPLE: B
An angle is named by: 3. BY USING A NUMERAL. EXAMPLE: 1 1 1
EXERCISES 3 2 1
NAME THE ANGLES USING A NUMERAL NAME THE ANGLES USING 3 POINTS 3 2 1
WHAT ARE THE SIDES OF ANGLE 3. ANOTHER NAME OF ANGLE 1. B or ABWPBC or ABC Segment AC and ray AP 3 2 1
WHAT IS THE COMMON SIDE OF 2 AND 3? Segment AC 3 2 1
Name the three angles in the diagram. WXY, or YXW YXZ, or ZXY WXZ, or ZXW EXAMPLE 5 Name angles You should not name any of these angles X because all three angles have Xas their vertex.
Degrees: Measuring AnglesAngles are measured in units called DEGREES and classified according to their measures.
Degrees: Measuring AnglesWe measure the size of an angle using a device called the PROTRACTOR.
Use a protractor for exercises 1-2 Construct an angle with a measure of 45 degrees. Construct an angle with measure of 125 degrees.
QUIZ • 1. NAME THE ANGLES USING 3 POINTS. • 2. WHAT ARE THE SIDES OF PAR? • 3. WHAT IS THE VERTEX OF DAR? D P R A
HOMEWORK • WHAT IS A POLYGON? • WHAT ARE THE TYPES OF POLYGON?