Identify each triangle based on angles (Acute, Obtuse, or Right)
Obtuse triangle
It’s more than 90 degrees but less than 180 degrees.
Obtuse angle
Acute angle
Right angle
Parallel lines
Identify each triangle based on angles (Acute, Obtuse, or Right)
Obtuse triangle
Is the dotted line on each shape a LINE OF SYMMETRY or NOT
It is a line of symmetry
Determine whether each pair of lines is parallel or perpendicular
perpendicular lines
Is the dotted line on each shape a LINE OF SYMMETRY or NOT
It is not a line of symmetry
Find the measure of the unknown angle
51 + 90 = 141 ; 180 - 141 = 39
How many right angles does a parallelogram have?
A parallelogram has 0 right angles
Tell the relation between the pair of lines in each shape
UV is parallel to TW (UV // TW)
How many pairs of equal length?
2 pairs of equal length
How many right angles does the square have?
A square has four right angles.
Identify each triangle based on angles (Acute, Obtuse, or Right)
Right triangle
They never meet and stay the same distance apart.
Acute angle
Parallel lines
Right angle
Obtuse angle
They meet at right angles, forming 90-degree angles.
Perpendicular lines
Obtuse angle
Acute angle
Parallel lines
Determine whether each pair of lines is parallel or perpendicular
perpendicular lines
It’s less than 90 degrees.
Acute angle
Parallel lines
Right angle
Obtuse angle
How many pairs of parallel sides?
1 pair of parallel sides
Is the dotted line on each shape a LINE OF SYMMETRY or NOT
It is a line of symmetry
Find the measure of the unknown angle
65
68
67
66
Identify the angle
Obtuse angle (greater than a right angle)
Identify each triangle based on angles (Acute, Obtuse, or Right)
Acute triangle
Identify the angle
Acute angle (less than a right angle)
Identify each triangle based on angles (Acute, Obtuse, or Right)
Right triangle
Identify each triangle based on angles (Acute, Obtuse, or Right)
Acute triangle
It measures exactly 90 degrees.
Acute angle
Obtuse angle
Right angle
Parallel lines
How many pairs of parallel sides?
2 pairs of parallel sides
Identify each triangle based on angles (Acute, Obtuse, or Right)
Obtuse triangle
Find the measure of the unknown angle
37 + 66 + 37 = 140; 180 - 140 = 40 degrees
What do all angles in a circle equal to?
It’s more than 90 degrees but less than 180 degrees
They meet at right angles, forming 90-degree angles.
They add up to 360 degrees
It’s less than 90 degrees
How many pairs of parallel sides?
2 pair of parallel sides
Find the measure of the unknown angle
54
64
114
74
They add up to 180 degrees, like steps on a staircase.
Straight line
Parallel lines
Acute angle
Obtuse angle
Tell the relation between the pair of lines in each shape
WX // ZY
Determine whether each pair of lines is parallel or perpendicular
parallel lines
How many pairs of equal length?
1 pairs of equal length (AB = DC)
Identify the angle
Acute angle (less than a right angle)
Find the measure of the unknown angle
108
109
107
106
How many right angles does a trapezoid have?
A trapezoid has 0 right angles
Determine whether each pair of lines is parallel or perpendicular
perpendicular lines
Is the dotted line on each shape a LINE OF SYMMETRY or NOT
It is a line of symmetry
Identify each triangle based on angles (Acute, Obtuse, or Right)
Acute triangle
Identify the angle
Right angle (equal to a right angle)
Is the dotted line on each shape a LINE OF SYMMETRY or NOT
It is not a line of symmetry
Find the measure of the unknown angle
71
72
61
111