Triangles
The triangle all three angles less than 90 degrees.
acute triangle
A shape with 5 sides
pentagon
A quadrilateral with 4 congruent sides.
Rhombus
4 + 0.3 + 0.05 + 0.002 =
4.352
78 + 125 − 50 =
153
The triangle with at least one angle greater than 90 degrees.
Obtuse Triangle
A shape with 6 sides
hexagon
Is a kite a rhombus? why or why not.
No because a rhombus has 4 congruent sides and a kite has 2 pairs of congruent sides.
Compare each pair of decimals. Which is the lesser decimal.
6.423 6.427
6.423
370 − 125 ÷ 5 =
345
A triangle with one 90 degree angle.
Right Triangle
a shape with 7 sides.
heptagon
A quadrilateral with one pair of parallel sides.
Trapezoid
Which is the greater decimal
3.081 3.18
3.18
15 × (416 − 312) =
1560
A triangle with sides equal side lengths.
isosceles triangle
A shape with 8 equal sides.
octagon
A shape with 10 equal sides.
decagon
Order the decimals from least to greatest.
1.008, 0.08, 0.108
0.08, 0.108, 1.008
510 + (42 + 38) × 7 =
1070
A triangle with 3 different side lengths.
Scalene triangle.
A shape with 9 equal sides.
nonagon
When is a shape irregular?
When it is a closed figure but does not have all sides equal in length.
Round each decimal to 2 decimal places.
6.457
6.46
(325 + 45) ÷ 5 × 2 =
148