Lesson 09: Drawing Triangles (Part 1) | Unit 7: Angles, Triangles, and Prisms

Draw

Use a protractor to try to draw each triangle. Draw the following triangles and determine which one is impossible to draw: 1. A triangle where one angle measures $$20^\circ$$ and another angle measures $$45^\circ$$ . 2. A triangle where one angle measures $$120^\circ$$ and another angle measures $$50^\circ$$ . 3. A triangle where one angle measures $$90^\circ$$ and another angle measures $$100^\circ$$ .

Draw

A triangle has an angle measuring $$90^\circ$$ , an angle measuring $$20^\circ$$ , and a side that is 6 units long. The 6-unit side is in between the $$90^\circ$$ and $$20^\circ$$ angles. Sketch this triangle and label your sketch with the given measures.

Multiple Choice

A triangle has an angle measuring $$90^\circ$$ , an angle measuring $$20^\circ$$ , and a side that is 6 units long. The 6-unit side is in between the $$90^\circ$$ and $$20^\circ$$ angles. How many unique triangles can you draw like this?

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Draw

A triangle has one side that is 7 cm long and another side that is 3 cm long. Sketch this triangle and label your sketch with the given measurements. (If you are stuck, try using a compass or cutting some straws to these two lengths.)

Draw

A triangle has one side that is 7 cm long and another side that is 3 cm long. Draw one more triangle with these measurements that is not identical to your first triangle.

Open Ended

A triangle has one side that is 7 cm long and another side that is 3 cm long. Explain how you can tell the two triangles you drew are not identical.

Draw

Han draws a triangle with a $$50^\circ$$ angle, a $$40^\circ$$ angle, and a side of length 4 cm as shown. Can you draw a different triangle with the same conditions?