Angles in triangles (age 7+)

MathematicsGeometryAges 7–8

Recognise and draw shapes having specified attributes (e.g. a given number of angles or equal faces); identify triangles, quadrilaterals, pentagons, hexagons, and cubes

Teach this topic

Share and support

Teaching Table

Set out your lesson

Classify polygons by sides and angles, not appearance.

Activity

Ask the learner to explain one prerequisite idea before starting. If uncertain, revisit it; graph order is not learner readiness.

Policy

Check readiness rather than assuming source graph order establishes attainment.

Instructions

Use polygon SVG and scrap paper. Do not infer that this title requires triangle angle sums; the canonical contract asks shape attributes.

No Printer

Use the supplied stage cards on screen or scrap paper; adult key stays separate.

Materials are ready in each step. Use them on screen or print just the current step. Put teaching examples aside before the learner tries.

What this lesson covers and its limits

These are bounded opportunities, not learner attainment. Partial and blocked source requirements remain so.

partial: Recognise and draw shapes having specified attributes (e.g. a given number of angles or equal faces); identify triangles, quadrilaterals, pentagons, hexagons, and cubes
Bounded objective: Classify polygons by sides and angles, not appearance. Polygon subset only; cube/equal-face part of description not assessed here.
partial: Draw a shape with exactly 5 sides (pentagon)
Five-sided drawing opportunity with simple closed-boundary criterion.
partial: Identify all quadrilaterals in a set of mixed shapes
Quadrilaterals identified from supplied outlines, finite set only.
partial: Name and draw a hexagon, explaining it has 6 sides and 6 angles
Hexagon drawing plus six-side/six-angle explanation required.
partial: If {{name}} is given instructions like "draw a shape with 5 sides" or "draw a shape with all equal angles," can they draw it correctly?
Try offers new-visual-and-drawing-application for the bounded objective; it does not establish every part of the source assessment. Polygon subset only; cube/equal-face part of description not assessed here.

Polygon subset only; cube/equal-face part of description not assessed here.

Share teaching feedback Continue to your family plan

Entire curriculum

1590 concepts · 8 subjects

Compare teaching approaches

Teaching approaches

Gakuva’s recommended starting approach is selected. You can still compare every option.

1 approach

Selected Default Gakuva

Classify polygons by sides and angles, not appearance.

Family records and proof options

Keep a record of your learning

Save photos, notes, and attendance. Export a proof packet for compliance or portfolio reviews.

Start Family ($12/mo) See sample proof packet

Learning resources

External links for extra practice. They do not replace Gakuva’s teaching approach.

No additional resources are listed for this topic.

The teaching approach appears above.

Check understanding

Draw a shape with exactly 5 sides (pentagon)
Identify all quadrilaterals in a set of mixed shapes
Name and draw a hexagon, explaining it has 6 sides and 6 angles

“If your child is given instructions like "draw a shape with 5 sides" or "draw a shape with all equal angles," can they draw it correctly?”

Curriculum record

Type: Procedural
Subject: Mathematics
Domain: Geometry
Age range: Ages 7–8

Standards

ccss-math:2.G.1