Monday 3_8

Monday 3_8

We are reviewing triangles this week so we can take a quiz on Friday. Use your notebook and calculator to help

Multiple Choice

A triangle has a 30^o angle, a 60^o angle, and one side 4 inches in length. Which of the following must be true? (Hint: Find the missing angle)

• This is an acute triangle

• The triangle has an angle measuring 80^o

• This is an equilateral triangle

• The triangle must be a right triangle

Multiple Select

A triangle has a 35^o angle, a 55^o angle, and a side 4 inches in length. What is true about this triangle? (Hint: Find the missing angle)

• This is a right triangle

• This is an obtuse triangle

• This is a scalene triangle

To find the possible third side of a triangle

• Subtract the known sides to find how small

• Add the known sides to find how big

• Create a range: small < T < big

• Anything in the range can be a third side

Multiple Select

A line is 7.5 inches long. Which set of line measurements can be used with this line to create a triangle. Select all that apply.

• 3 in. and 4 in.

• 3.5 in. and 4 in.

• 3.5 in. and 4.5 in.

• 4 in. and 4.5 in.

Multiple Select

A line is 8 inches long. Which set of line measurements can be used with this line to create a triangle. Select all that apply.

• 4 in. and 4 in.

• 4.5 in. and 4 in.

• 4.5 in. and 5 in.

• 4 in. and 5 in.

Three side lengths form a triangle if

short + short > longest side

Multiple Choice

Which set of measurements will create a triangle?

• 3,4,5

• 6,3,2

• 10, 4, 5

• 3, 2, 1

Multiple Choice

Which set of measurements will NOT create a triangle?

• 13,14,15

• 16,3,2

• 10, 14, 5

• 23, 22, 21

Three angles form a triangle if

The three angles add to 180^o

Multiple Select

Which of the following will create a triangle? Select all that apply

• Side lengths of 11 cm, 8 cm, and 19 cm

• Side lengths of 22 in., 8 in., and 15 in.

• Angle measurements of 65^o, 35^o, and 80^o

• Angle measurements of 54^o, 36^o, and 88^o

Multiple Select

Which of the following will create a triangle? Select all that apply

• Side lengths of 12 cm, 6 cm, and 17 cm

• Side lengths of 20 in., 6 in., and 13 in.

• Angle measurements of 67^o, 37^o, and 82^o

• Angle measurements of 52^o, 38^o, and 90^o