right-angled triangles
Ninety-degree corner shapes
Right-angled triangles is the British English term for what Americans call right triangles—triangles containing one 90-degree angle.
The phrase appears in geometry instruction and technical contexts: The Pythagorean theorem applies to right-angled triangles.
The hyphenated compound emphasizes the angle's defining characteristic.
Point where edges converge
- verticesCorner points of shapes
- perpendicularAt right angles
- altitudeMeasured height above reference
- baseSupporting bottom structure
height · area · perimeter · congruence · similarity · scalene · isosceles · median
Opposite over hypotenuse
- cosineRatio in triangle math
- tangentLine touching curve once
- oppositeReverse or contrary thing
- adjacentDirectly next to
hypotenuse · theta · secant · cosecant · cotangent · inverse functions · unit circle · degrees
Demonstrated logical conclusion
- PythagorasAncient Greek mathematician
- hypotenuseLongest right-triangle side
- legsLocomotion appendages below torso
- square rootNumber times itself equals original
proof · converse · diagonal · longest side
Steepness of rooftop slope
- rampSloped connecting surface
- ladderPortable climbing frame
- surveyingMeasuring and charting terrain
- navigationDetermining position and course
architecture · engineering · slope · grade · structural support
Tool for drawing angles
- T-squareRight-angled drawing guide
- protractorAngle-measuring instrument
- draftingCreating technical blueprints
- technical drawingPrecise specification illustration
compass · straightedge · 90 degrees · bisector · carpenter's square · L-shape · framing square
vertex
Point where edges converge
- verticesCorner points of shapes
- perpendicularAt right angles
- altitudeMeasured height above reference
base · height · area · perimeter · congruence · similarity · scalene · isosceles · median · centroid
sine
Opposite over hypotenuse
adjacent · hypotenuse · theta · secant · cosecant · cotangent · inverse functions · unit circle · degrees · radians
theorem
Demonstrated logical conclusion
- PythagorasAncient Greek mathematician
- hypotenuseLongest right-triangle side
- legsLocomotion appendages below torso
square root · proof · converse · diagonal · longest side
roof pitch
Steepness of rooftop slope
navigation · architecture · engineering · slope · grade · structural support
set square
Tool for drawing angles
- T-squareRight-angled drawing guide
- protractorAngle-measuring instrument
- draftingCreating technical blueprints
technical drawing · compass · straightedge · 90 degrees · bisector · carpenter's square · L-shape · framing square
right, angled, triangles, angle, triangle, rightly, righteous, righteousness, rightful