a The hatch marks tell us that these sides are equal in length.
B
b The hatch marks tell us that sides are equal in length and the angles are equal in measure.
C
c The sides with the same number of arrowheads are parallel.
D
d Can we say something about the side's relative lengths to each other?
E
e What can you say about two sides and one angle of the shape?
F
f The sides with the same number of arrowheads are parallel.
A
a Isosceles triangle
B
b Regular Pentagon
C
c Parallelogram
D
d Scalene triangle
E
e Isosceles right triangle
F
f Trapezoid
Practice makes perfect
a This is a shape with three vertices, which means it can be classified as a triangle. We also see that two sides have an equal number of hatch marks. This indicates that these sides are equal in length.
b Any shape with five vertices is known as a pentagon. There are markings on its sides indicating that they are of equal length. Its angles are also marked, meaning they are of equal measure.
This type of pentagon is called a regular pentagon.
c From the diagram, we see a quadrilateral where two pairs of sides have been marked as parallel.
This type of a quadrilateral is called a parallelogram.
d Like in Part A, the shape has three vertices which means it is a triangle. Additionally, all sides have a different number of markings. This tells us they all have different lengths.
e Like in Parts A and D, we have a shape with three vertices which means it is a triangle. Additionally, we see that one angle is right and two sides have equal length.
Such as triangle is called a right isosceles triangle.
f The shape has four sides, which means it is a quadrilateral. It also has two sides that are parallel, as indicated by the markings.
A quadrilateral with one pair of parallel sides is called a trapezoid.
