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Area of an Obtuse Triangle Calculator

Result

Calculated result 20 Based on the values entered.
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Area of an Obtuse Triangle Calculator The Area of an Obtuse Triangle Calculator finds the area of a triangle that has one angle greater than 90°. Enter the base and the corresponding height, or use the side-angle-side form. The formula used is: Area = ½ × — free online calculator.

Formula

Area = ½ × base × height
  • Area of an Obtuse Triangle Calculator calculates its result from Base, Height (perpendicular to base). It uses the formula Area = ½ × base × height. Change any input to recalculate the result instantly.
  • The main inputs are Base, Height (perpendicular to base). Enter them in the units and format shown in the calculator.
  • Keep comparable quantities in compatible units whenever the formula combines or compares them.
  • Changing any input above recalculates the result with the same calculation engine used by this page.

Example: Area of an Obtuse Triangle

Inputs
  • Base: 10
  • Height (perpendicular to base): 4

Using Base = 10, Height (perpendicular to base) = 4, the calculated result is 20.

Sample result: Calculating…

Frequently asked questions

What does the Area of an Obtuse Triangle calculate?

Area of an Obtuse Triangle Calculator The Area of an Obtuse Triangle Calculator finds the area of a triangle that has one angle greater than 90°. Enter the base and the corresponding height, or use the side-angle-side form. The formula used is: Area = ½ × — free online calculator.

Which values should I enter?

Enter Base, Height (perpendicular to base) using the units and format shown beside each field.

What formula does this calculator use?

The calculator uses the following relationship: Area = ½ × base × height.

Why might my result differ from another source?

Results can differ when another source uses different units, rounding rules, conventions or assumptions. Compare the inputs and definitions before comparing results.

Does the result update automatically?

Yes. Changing an input updates the result using the same calculation engine shown on this page.

Page information

Updated: October 7, 2026