Presentation on theme: "2.3 Cont. Warm-up (IN) Learning Objective: To understand Angle of Depression and Angle of Elevation, demonstrating their use by defining them in a real."— Presentation transcript:
2.3 Cont. Warm-up (IN) Learning Objective: To understand Angle of Depression and Angle of Elevation, demonstrating their use by defining them in a real world setting. 1.Convert to degrees. 2.Convert 252º to radians. 3.Find the arc length and area of a sector in a circle with radius 12 yds and central angle 70 º.
NOTES Ex 1 – Find the width of the river:
Vertical heights can be measured in 2 ways Angle of elevation Angle of depression **Both require a horizontal line as a reference!
Ex 2 – A meteorologist finds the height of a cloud using a ceilometer. A ceilometer consists of a light projector that directs light upward and a light detector that is away from the source and scans the cloud for the light projected. The base between the light and the detector is 300 ft and the angle of elevation is 75º, how high is the cloud?
HW – p. 149 #47,48,51,55,60, 64,68,69 Out – Describe the difference between angle of elevation and angle of depression Summary - I hope that…