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Ch. 1 Highlights Geometry A

Ch. 1 Highlights Geometry A

Ch. 1 Highlights Geometry A. Ms. Urquhart Mrs. Vander Bee. Coplanar Objects. **Remember: Any 3 non-collinear points determine a plane!. Coplanar objects (points, lines, etc.) are objects that lie on the same plane. The plane does not have to be visible.

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1.4 Lesson

1.4 Lesson

1.4 Lesson. Measure and Classify Angles. Angle, Vertex, and Sides. an angle consists of two rays that share the same endpoint. The point where the rays intersect is called the vertex of the angle. The two rays are called the sides of the angle. Name the three angles in diagram.

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EXAMPLE 1

EXAMPLE 1

Name the three angles in the diagram. WXY, or YXW. YXZ, or ZXY. WXZ, or ZXW. You should not name any of these angles X because all three angles have X as their vertex. EXAMPLE 1. Name angles.

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In the skateboard design, VW bisects XY at point T , and XT = 39.9 cm . Find XY .

In the skateboard design, VW bisects XY at point T , and XT = 39.9 cm . Find XY .

Skateboard. In the skateboard design, VW bisects XY at point T , and XT = 39.9 cm . Find XY. Point T is the midpoint of XY . So , XT = TY = 39.9 cm. EXAMPLE 1. Find segment lengths. SOLUTION. XY = XT + TY. Segment Addition Postulate. = 39.9 + 39.9. Substitute. = 79.8 cm.

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SOLUTION

SOLUTION

In the diagram at the right, YW bisects XYZ , and m XYW = 18 . Find m XYZ. o. By the Angle Addition Postulate, m XYZ = m XYW + m WYZ . Because YW bisects XYZ you know that XYW WYZ.

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SOLUTION

SOLUTION

In the diagram at the right, YW bisects XYZ , and m XYW = 18 . Find m XYZ. o. By the Angle Addition Postulate, m XYZ = m XYW + m WYZ . Because YW bisects XYZ you know that XYW WYZ.

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110 views • 3 slides
SOLUTION

SOLUTION

In the diagram at the right, YW bisects XYZ , and m XYW = 18 . Find m XYZ. o. By the Angle Addition Postulate, m XYZ = m XYW + m WYZ . Because YW bisects XYZ you know that XYW WYZ.

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134 views • 2 slides
SOLUTION

SOLUTION

In the diagram at the right, YW bisects XYZ , and m XYW = 18 . Find m XYZ. o. By the Angle Addition Postulate, m XYZ = m XYW + m WYZ . Because YW bisects XYZ you know that XYW WYZ.

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120 views • 2 slides

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