triangle angles
A triangle where all 3 angles are less than 90 degrees.
What is an Acute triangle
a line that divides a shape into two identical mirror-image halves
line of symmetry
an angle that measures exactly 90 degrees
a right angle
a triangle where all 3 sides are the exact same length
an equilateral triangle
Which type of triangle from following is NOT possible:
1. a right equilateral
2. a obtuse scalene
3. an acute equilateral
4. a right isosceles
a right equilateral
A triangle that contains on angles larger than 90 degrees.
obtuse triangle
type of triangle with exactly one live of symmetry
isosceles triangle
an angle that is 'sharp' and measures less than 90 degrees
an acute angle
a triangle that has only 2 sides of equal length.
When measuring an angle, Mme. Sauve reads her protractor's 2 scales.
The angle measures either 140 degrees on the outer scale or 40 degrees on the inner scale.
The angle vertex is on the left side of the protractor, making zero on the inner scale.
What is the correct measure of the angle?
The angle measures 40 degrees.
the name for the three angles located inside the boundaries of a triangle.
interior angles
a triangle with zero lines fo symmetry
an angles that measures more than 90 degrees but less than 180 degrees
an obtuse angle
a triangle where none of the sides are the same length.
a scalene triangle
I have a scalene obtuse triangle named ABC.
angle A and angle B measure 40 degrees
How much does angle C measure?
The sum of all three interior angles in any triangle
180 degrees
a triangle with 3 lines of symmetry
equilateral triangle
the exact poit where two 'arms' form an angle
a vertex
A triangle has 3 sides:
AB = 3cm
BC = 30 mm
CA = .02m
What is the type of triangle?
it is an isosceles triangle
An angle is named HKL.
Which letter represents the vertex?
letter K
an angle that measure greater than 180 degrees but less than 360 degrees.
a reflex angle
I want to measure a reflex angle with my protractor.
The "left over" inside angle (the small portion) measures 60 degrees.
What is the measure of my reflex angle?
the reflex angle measure 300 degrees.