IM 8.1.15 Practice: Adding the Angles in a Triangle

[size=150]In triangle [math]ABC[/math], the measure of angle [math]A[/math] is [math]40°[/math].[/size][br][br]Give possible measures for angles [math]B[/math] and [math]C[/math] if triangle [math]ABC[/math] is isosceles.
Give possible measures for angles [math]B[/math] and [math]C[/math] if triangle [math]ABC[/math] is right.
For the following sets of angles, decide if there is a triangle whose angles have these measures in degrees. If you get stuck, consider making a line segment. Then use a protractor to measure angles with the first two angle measures.
60, 60, 60
90, 90, 45
30, 40, 50
90, 45, 45
120, 30, 30
Angle [math]A[/math] in triangle [math]ABC[/math] is obtuse. Can angle [math]B[/math] or angle [math]C[/math] be obtuse?
Explain your reasoning.
Describe the transformation that could be applied to Polygon A to get Polygon B.
Describe the transformation performed above.
Describe the transformation that could be applied to Polygon A to get Polygon B.
Describe the transformation performed above.
Describe the transformation that could be applied to Polygon A to get Polygon B.
Describe the transformation performed above.
On the grid, draw a scaled copy of quadrilateral ABCD using a scale factor of 1/2.
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– GeoGebra Classroom Activities, IM 6 – 8 Math

Information: IM 8.1.15 Practice: Adding the Angles in a Triangle