Grade 4 Geometry: Classify triangles by angles

Generate a printable Grade 4 geometry worksheet for this skill. Change the difficulty, layout or problem count below, then print the worksheet or its answer key.

What students practice: Classifying figures by parallel sides and angle size.

Customize your worksheet

A worksheet is already ready in the preview. Change the grade, operation or skill to update it, then print.

What to practice

GradeDifficulty

OperationSkill

Worksheet options

Number of problemsLayout

Worksheet titleSuggested from the skill. Type your own to replace it.Print styleApplies to the worksheet and the answer key. Large print uses bigger text and fewer columns.Show answers on screen

This only affects the preview below. “Print worksheet” always prints without answers, even if this is checked.

For a clean worksheet, turn off “Headers and footers” in your browser’s print settings. Paper size: US Letter (A4 also works). Scale: 100%.

Worksheet preview — matches what “Print worksheet” produces.Grade 4 · Geometry · Classify triangles by angles · Standard

Grade 4 · Geometry

Classify Triangles by Angles

Name: Class: Date:

Set 1 · Grade 4 · Geometry

Example problems by difficulty

Real samples from this generator. Every worksheet is a fresh random set, so yours will differ.

Easy

Classify this triangle by its angles. Write acute, right, or obtuse.
Answer: obtuse

Standard

Classify this triangle by its angles. Write acute, right, or obtuse.
Answer: acute

Challenge

Classify this triangle by its angles. Write acute, right, or obtuse.
Answer: acute

Where this skill fits

Previous skill: Acute, right and obtuse angles
Next skill: Pairs of parallel sides
All grades: Geometry worksheets, Grades 1–5

Related Common Core standards

4.G.A.2 — Classify shapes by parallel/perpendicular sides and angle sizes; identify right triangles.

The task matches what these standards describe at this grade. Common Core–informed practice; not a claim of official alignment.