The document provides instructions for constructing triangles given certain angle and side length conditions. It gives examples of constructing Triangle 1 with angles of 300 and 800 and an included side of 2 inches, and Triangle 2 with angles of 550 and 500 and an included side of 1 inch. It then asks students to construct triangles with side lengths of 3, 4, 5 inches and 1, 2, 5 inches and explain whether it was possible. Finally, it provides two practice problems to construct triangles with given angle and included side length conditions before the end of class.

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Do Now
AIM: Constructing Triangles
Find the area and circumference of the
following circle. Write your answer in Pi
notation.
10 in.
A = ∏r2
C = D∏

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Draw each triangle with the given conditions.
Triangle 1
Angles: 300
and 800
Included Side: 2 inches
Triangle 2
Angles: 550
and 500
Included Side: 1 inches
Triangle 1:
Step 1: Draw a line that is 2inches long. (This will be the included side)
Step 2: Place the center of the protractor on the left end of the 2in line. Then make
a 300
angle mark.
Step 3: Draw a line connecting the left side of the 2in line and the 300
angle mark.
This will be the 300
angle.
Step 4: Repeat step 2 on the right side of the triangle to constrict the 800
angle.
Step 5: The side of the 800
angle and the side of the 300
angle will intersect. This is
triangle 1 with angles of 300
and 800
and an included side of 2 inches.

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Step 6: Now draw triangle 2.

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A.) Create a triangle with the following three side lengths. ( 3in, 4in, 5in)
B.) Were you able to draw the triangle. Explain why or why not?

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C.) Create a triangle with the following three side lengths. ( 1in, 2in, 5in)
D.) Were you able to draw the triangle. Explain why or why not?

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On Core Page 94

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On Core Page 96 #1,2

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Before You Leave
1.) Construct a triangle with an included
side of 3 in., with angles 400
and 1000
.
2.) Construct a triangle with an included
side of 2.5 in., with angles 1000
and 1400
.

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Homework
None