Classifying Triangles
A triangle with three congruent sides
What is an equilateral triangle
Can you make a triangle with side length
4cm, 5cm, 10cm
What is no
an angle less than 90 degrees
What is an acute angle
<ABC ≅ <XYZ
Angle ABC is congruent to angle XYZ
Angle pairs formed by two lines crossing
What are vertical angles
A triangle with 3 acute angles
What is an acute triangle
Can you make a triangle with side lengths
4cm, 5cm, 7cm?
What is yes
The relationship of corresponding angles
What is congruent
AB⊥CD
AB is perpendicular to CD
Two adjacent angles that sum to 180 degrees
What is a linear pair
A triangle with a 90 degree angle
What is a right angle
If two sides of a triangle are 1cm and 3cm, the third side may be:
(a) 5cm (b) 2cm (c) 3cm d) 4cm
What is 3cm
The relationship of Same Side Interior Angles
What is supplementary
∆
What is a triangle symbol
A triangle with no congruent sides
What is a scalene triangle
If the lengths of two sides of a triangle are 5 cm and 7cm, the length of the third side may not be:
(a) 12cm (b) 7cm (c) 3cm (d) 5cm
What is 12 cm
Congruent opposite angle pairs formed by two crossing lines
What are vertical angles
∥
What is parallel
∡A≅∡A
What is the reflexive property
A triangle with 2 congruent sides
What is an isosceles triangle
Two sides of an isosceles triangle have lengths 2cm and 12cm , respectively. Find the length of the third side.
What 12 cm.
Two adjacent angles that sum to 180 degrees
What is a linear pair
⊥
What is perpendicular
if a=b
and b=c
then a=c
What is the transitive property