Do First!

• Fill out the table below

• Is this a right angle triangle? Why?

a b c

1) Find the diagonal of the rectangle

2) Find total length of the lines used to draw the figure?

3 cm

4 cm

“Know your Angles”• Strong gusts of wind totally knocked

your DSS satellite dish to the ground!• The nuts and bolts have loosened. You

want to know see nicki minaj and drake getting married in BET because is it getting aired in the evening and you can't miss it.

• You follow instructions , to mount the dish, carefully but you don't understand

• one part of the instructions.• Position the dish at an angle of 101

with the horizon.• You don't get to see nicki minaj and

drake getting married..sniff sniff if you don't know your angles.

Satellites Orbit Earth to transmit information around the world and into outerspace.Geosynchronous satellites orbit Earth at a distance of 22,000 miles at aspeed of 6,803 mph in the same direction Earth rotates.From Earth, the satellite looks like it is at one location in the sky at all times.Direct TV DBS1, the satellite that transmits BET to your TV in your livingroom sits at a certain angle from Earth.It's important to know what angles are!

Introduction Instruction Examples Practice

•An angle is a figure formed by two rays with a common endpoint.

•The common endpoint is the vertex of the angle.•The rays are the sides of the angle.

•Angles are formed when lines, rays, or line segments intersect.

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T

Introduction Instruction Examples Practice

•An angle is named using three points.•The vertex must be the middle point of the name.•Write TSR or TRS.•Say “angle TSR” or “angle T R S.”.

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Introduction Instruction Examples Practice

•When geometric figures have one or more points in common, they are said to intersect.•The set of points that they have in common is called their intersection.

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•Examine the geometric model at the right.•Specifically, identify the places where lines intersect each other.•Complete the sentence:

The intersection of two lines is a ___________.