Angles
Look at the corner of a book. Is this angle right, acute, or obtuse?
Right Angle
A shape has three sides. What kind of polygon is it?
Triangle
This type of line pair runs side-by-side and never touch, no matter how long they go.
Parallel lines
What is it called when you make an educated guess?
Estimating
You have 4 groups of 10 stickers and 3 single stickers. Using quantity and value, this is the total number of stickers you have.
43
A clock shows the time 3:00. What type of angle is this?
Right Angle
A shape has four straight sides - all the same length. What is this type of polygon called?
A square
These lines cross each other to make a perfect square corner, or a right angle.
Perpendicular lines
When estimating objects in a container, you often look at a small part and imagine it repeated. This “small part” is called this.
A sample size
You count 5 bundles of 100 pencils. Using value, the bundles are worth this many pencils in total.
500
Ben spreads his arms wide apart. The angle between his arms looks bigger than a right angle. What type of angle is it?
Obtuse Angle
Look at this shape: Is this polygon convex or non-convex?
Nonconvex
In your spelling book the paper has horizontal lines. What kind of lines are they?
Parallel lines
You peek into a bin of markers. You grab a small handful (about 8) and notice that the bin looks like it holds about 5 of those handfuls. Your estimate would be about this number.
approximately 40
A student has 6 groups of 5 candies. How many in total?
30
Sasha opens a door just a little bit. The angle between the door and the wall is small. What kind of angle is it?
Acute Angle
Is a triangle a quadrilateral? Explain why or why not.
No, because quadrilaterals have 4 sides and a triangle only has 3.
The corner of a book or a classroom wall makes this kind of line relationship.
Perpendicular Lines
You scoop a small cup of beads and count about 12. The whole container looks like it holds about 4 of those cups. Your estimate for the total number of beads is this.
Approximately 48
A jar has 8 rolls of 10 coins each, plus 4 loose coins. The total number of coins is this.
84
Draw two lines that make a small angle. What kind of angle did you draw?
Acute Angle
Is this polygon convex or non-convex?
None, because a circle is not a polygon.
A polygon has:
Straight sides
Sides that connect to form a closed shape
At least three sides
If two lines meet but do not make a right angle and they are not parallel. What kind of lines are they?
Neither parallel or perpendicular
You count 6 blocks in a small section of a bucket. The bucket looks like it has about 7 sections that size. Your estimate for the total number of blocks is this.
Approximately 42
There are 3 bags of 20 beads and 2 extra beads. Counting by groups helps you find this total amount of beads.
62