7G Lesson 19 Triangle Sides and Angles 2

Which if the following measurements could NOT represent the lengths of triangle sides?

• 1in 1in 1in

• 2m 5m 6m

• 1in, 1in, 7in

• 20m 30m 40m

Which if the following measurements could NOT represent the lengths of triangle sides?

• 12m 15m 20m

• 12.5m 6m 15m

• 5ft 11ft 12ft

• 5m 6m 1m

Is this a real triangle? 150 degrees 15 degrees and 70 degrees?

• No, because the two angles are not more than the third

• No, because the angles are over 180 degrees

• Yes, because the angles are equal to 180 degrees

• Yes, because the angles are over 180 degrees

Is this a real triangle? 106 degrees 70 degrees and 4 degrees?

• No, because the two angles are not more than the third angle

• No, because I said so

• Yes, because any three angles make a trianle

• Yes, because the angles add to 180 degrees

Could the sides of a triangle be 10in, 4in, and 6in?

• No, because two sides are not greater than the third side

• No, because two sides are greater than the third side

• Yes, because two sides equal the third side

• Yes, because any three sides can make a triangle

Could the sides of a triangle be 12in, 15in, and 22in

• No

• Yes

How many different triangles, if any, can be drawn with side lengths of 2cm, 4cm, & 7cm?

• Infinite Triangles

• No Triangles

• One Triangle

How many different triangles, if any, can be drawn with side lengths of 10cm, 4cm, & 7cm?

• Infinite Triangles

• No Triangle

• One Triangle

Is it possible to draw a triangle with angles of 100 degrees and 90 degrees and a side length of 10 in?

• No, the two angles are over 180 degrees

• No, that side will not work

• No, you need three angles

• Yes, the angles and sides work together

Is it possible to draw a triangle with angles of 10 degrees and 90 degrees and a side length of 10 in?

• Yes, the two angles are under 180 degrees so there is room for a third angle

• Yes, the two angles are equal to 180 degrees

• No, the two angles do not add to 180 degrees

• No, the two angles are too pretty to be a triangle