Classifying Triangles by Sides and Angles

Triangles by sides

100

What is a triangle that has all sides that are the same? 

What is an equilateral triangle? 

200

If a triangle has the side lengths of 4cm,3cm, and 4 cm, what kind of triangle is it? 

What is an isosceles triangle? 

300

If a triangle has sides that are 3cm, 6cm, and 4 cm, it is  _____________. 

What is scalene? 

400

Triangle ABC has sides that are 5cm,5cm,and 5cm long. 

What is equilateral. 

500

Triangle ABC has sides that are 11cm,11cm, and 12cm. Triangle DEF has sides that are 13cm,12cm,14cm. What kind of triangle is ABC? 

What is isosceles? 

Triangles by angles

100

What angle is always less than 90^o ?

What is acute? 

200

A triangle that has an angle of 110^o. 

What is an obtuse triangle? 

300

If a triangle has the angles 60^o, 60^o, and 60^o, what kind of triangle is it? 

What is acute? 

400

A triangle has the angles 45^o, 45^o, and 90^o. What kind of triangle will this not be. 

What is obtuse or acute? 

500

If a triangle is a right triangle this means that.... 

What is one of the angles will be 90^o?

Triangles by sides & angles

100

An acute isosceles triangle. 

What is a triangle that has angles that are all less than 90^o and 2 sides that are the same? 

200

I have a triangle that has sides that are 5cm, 3cm, and 5cm. The angles are 65^o, 45^o, and 70^o. What is the triangle? 

What is an acute isosceles? 

300

This triangle has angles that are 90^o, 65^o, and 25o. The sides are 3cm, 4cm, and 5cm. 

What is a right scalene? 

400

Triangle DEF has 2 sides that are 5cm and one side that is 3cm. It has two angles that measure 40^o and one that measures 100^o. This is an _________ ________. 

What is an obtuse isosceles triangle? 

500

Sides - 3cm,6cm, 7cm 

Angles- 47^o, 33^o,100^o

What is an obtuse scalene?

Previous Knowledge

100

The mode for this set of data. 

83,27,45,65,73,83,92,79,53,45,65,83

What is 83? 

200

25 squared is 

What is 625? 

300

A vertical angle is___________

What is an angle that is opposite another? Vertical angles will always be the same.

400

The square root of 9 is an example of what kind of number? 

What is a rational or whole number? 

500

Solve

3² x 3^-5 = 

What is 3^-3 or 1/27?

Formulas

100

Solve: 

if a is 3 and b is 12 then what is a² + b² = c

What is 153?

200

What is the formula for slope? 

What is y₂-y₁/x₂-x₁?

300

The formula for the area of a triangle. 

What is 1/2bh? 

400

Slope intercept form. 

What is y=mx+b?

500

a2+b2=c2 is the ___________ __________. 

What is the Pythagorean Theorem?