solving triangles unit.notebook
solving triangles unit.notebook Objective: SWBAT use law of cosines to
February 26, 2016
find missing sides and angles in triangles. Do Now: Cathy wants to determine the height of the flagpole shown in the diagram below. She uses a survey instrument to measure the angle of elevation to the top of the flagpole, and determines it to be 34.9°. She walks 8 meters closer and determines the new measure of the angle of elevation to be 52.8°. At each measurement, the survey instrument is 1.7 meters above the ground. Find height of flagpole to nearest tenth.
HW #14:Finish p.6-7 in packet
Feb 128:42 AM
Law of Cosines
The Law of Cosines can be used to:
2. Find the measure of an angle in a triangle if the lengths of the 3 sides are given. SSS given 1. Find the length of the 3rd side of a triangle when given the lengths of the other 2 sides and their included angle (the included angle is the angle in between the 2 sides). SAS given
Jun 2011:45 AM
1
solving triangles unit.notebook
February 26, 2016
Examples 1. Given BC = 34, AC = 45, & measure of angle BCA = 87o. Find AB to the nearest tenth.
Jun 2011:45 AM
2. In triangle XYZ, x = 9, y = 10, and z = 3. Find, to the nearest degree, the measure of the greatest angle.
Jun 2011:45 AM
2
solving triangles unit.notebook
February 26, 2016
Feb 267:57 AM
3
February 26, 2016
find missing sides and angles in triangles. Do Now: Cathy wants to determine the height of the flagpole shown in the diagram below. She uses a survey instrument to measure the angle of elevation to the top of the flagpole, and determines it to be 34.9°. She walks 8 meters closer and determines the new measure of the angle of elevation to be 52.8°. At each measurement, the survey instrument is 1.7 meters above the ground. Find height of flagpole to nearest tenth.
HW #14:Finish p.6-7 in packet
Feb 128:42 AM
Law of Cosines
The Law of Cosines can be used to:
2. Find the measure of an angle in a triangle if the lengths of the 3 sides are given. SSS given 1. Find the length of the 3rd side of a triangle when given the lengths of the other 2 sides and their included angle (the included angle is the angle in between the 2 sides). SAS given
Jun 2011:45 AM
1
solving triangles unit.notebook
February 26, 2016
Examples 1. Given BC = 34, AC = 45, & measure of angle BCA = 87o. Find AB to the nearest tenth.
Jun 2011:45 AM
2. In triangle XYZ, x = 9, y = 10, and z = 3. Find, to the nearest degree, the measure of the greatest angle.
Jun 2011:45 AM
2
solving triangles unit.notebook
February 26, 2016
Feb 267:57 AM
3
