Area of a right-angled triangle.
Get ready to explore the world of right-angled triangles and how to calculate their area using base and height. Your challenge is to solve each task accurately and prove your mastery of triangle measurements.

🙂 = Correct, ☹️ = Incorrect

📌 Rules

• Use the area formula for right-angled triangles:Area = (base × height) ÷ 2 (or 1/2 × base × height).

• Identify the perpendicular sides: In a right-angled triangle, the base and height are the two shorter sides that meet at the 90° right angle. Multiply these two lengths together first, then divide the answer by 2.

💡 Tips

• Halve one even side first to simplify calculations: If the base or height is an even number, halve it before multiplying to make mental maths easier! For example, for a triangle with base 8 cm and height 7 cm: calculate (8 ÷ 2) × 7 = 4 × 7 = 28 cm².

• Right-angled triangles are half of a rectangle: Think of a right-angled triangle as exactly one half of a rectangle with length = base and width = height.

• Quick typing on our platform: Typing your answer is designed to be super quick and simple! Just type plain numbers or decimals like 24 or 17.5 without adding unit labels (e.g. cm, cm², m²) or extra spaces.

⚠️ Warnings

• Ignore the hypotenuse (slanted side): The longest side opposite the right angle is called the hypotenuse. Never use the hypotenuse length to calculate the area of a right-angled triangle!

• Always divide by 2: Forgetting to halve base × height gives the area of a full rectangle, not a triangle!