Identify a Pentagon

Students recognize a pentagon as a polygon with exactly 5 sides and 5 angles, regardless of its size or orientation.

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Real questions from this skill, graded here. No account, and nothing is saved.

Identify a Pentagon

Grade 2 · Shapes and Their Attributes · question 1 of 3

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12 rungs. A star at the top.

Pentagon? Type its number.

Your answer:

How it is taught

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A pentagon is a polygon with five straight sides.

It does not have to look like a house.

Read it: Name a shape by its sides

Count the sides to name a shape. A pentagon and a hexagon can look alike until you count.

Start at one corner.
Go around once and count each side.
The number of sides gives the name.

A shape keeps its name when it is turned or flipped.

Every side ends at a corner, so a shape has as many corners as sides.

A square and a rectangle are quadrilaterals too.

Triangle, quadrilateral, pentagon, hexagon: count the sides, then name it.

Calling a shape a triangle because it has a point on top.

Count the sides. A shape with a point on top can be a pentagon.

2 pentagons have how many sides in all? — 10. Each pentagon has 5 sides: 5 + 5 = 10.

Pentagon shape

Have you seen home plate in baseball? It's shaped like a pentagon. Let's learn what makes a pentagon a pentagon.

Here is a pentagon. To spot one, we count two things — its sides and its corners.

Grade 2 · Five sides, five angles

Let's count the sides. This is side one.

Side two.

Side three.

Side four.

And side five. A pentagon has five sides.

Now let's check the corners. Each corner is called an angle.

One, two, three, four, five — five angles too.

Five sides and five angles — that's a pentagon! No matter how big or which way it turns.

Now you try. Name this shape from the list. Which shape is this?

What you see

While they climb, your page writes one true line to ask about tonight, and a short note each Sunday.

MayaGrade 3 · Mathematics

Did you know?

A chessboard has 64 squares — share them out between the 8 rows and each row holds exactly 8.

Today’s goal: 1 star — one skill mastered, every rung of its ladder climbed
Climbing now: Divide within 100

An example student.

MayaGrade 3 · Mathematics

Maya earned 2 stars this week — Interpret multiplication as equal groups, which took 6 answers over 3 days before its star landed 3 days ago and Multiply by 6, 7, 8 and 9. Next up: Divide within 100.

An example week.

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Standard

CCSS.2.G.A.1

Recognize and draw shapes having specified attributes, such as a given number of angles or a given number of equal faces; identify triangles, quadrilaterals, pentagons, hexagons, and cubes

Grade 2

Quoted from the Common Core State Standards.

Where this sits

Comes after

Identify Defining and Non-Defining Attributes of Shapes

Leads to

Identify Triangles, Quadrilaterals, Pentagons, and Hexagons

What a star here means

A star here is the top of a twelve-rung ladder, in four blocks of equal length — three of facts and one of the skill used in a real question — where a right answer climbs one rung and a wrong one drops back to the start of the block, never below it. The star is kept for good. How we grade

All of Grade 2

This is one rung of 85 in Grade 2 mathematics, in the order they build on each other.

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