right angle
Perfect perpendicular meeting
A right angle is the angle formed when two lines meet perpendicularly—exactly 90 degrees, like the corner of a square or rectangle.
It serves as a reference point in geometry: acute angles are smaller, obtuse angles larger.
The walls meet at right angles.
Cut the board at a right angle to the grain.
Rhombus with right angles
- set squareTool for drawing angles
- speed squareTriangular carpentry measuring tool
- T-squareRight-angled drawing guide
- framingStructural or contextual shaping
miter saw · joinery · woodworking · corner · brace · plumb · level · true
At right angles
- vertexPoint where edges converge
- protractorAngle-measuring instrument
- triangleThree-sided plane figure
- hypotenuseLongest right-triangle side
Pythagorean · theorem · bisector · adjacent · acute · obtuse · complementary · supplementary
Angle-measuring instrument
- compassDevice showing cardinal directions
- perpendicularAt right angles
- technical drawingPrecise specification illustration
- blueprintDetailed technical drawing
schematic · grid · ruler · template · CAD · orthographic · projection · scale
At right angles
- axisRotation reference line
- horizontalParallel to the horizon
- verticalAt right angles groundward
- CartesianOf x-y coordinate geometry
coordinate · normal · intersection · rectilinear · grid · matrix · vector · plane
square
Rhombus with right angles
- set squareTool for drawing angles
- speed squareTriangular carpentry measuring tool
- T-squareRight-angled drawing guide
framing · miter saw · joinery · woodworking · corner · brace · plumb · level · true · straightedge
perpendicular
At right angles
- vertexPoint where edges converge
- protractorAngle-measuring instrument
- triangleThree-sided plane figure
hypotenuse · Pythagorean · theorem · bisector · adjacent · acute · obtuse · complementary · supplementary · isosceles
protractor
Angle-measuring instrument
- compassDevice showing cardinal directions
- perpendicularAt right angles
- technical drawingPrecise specification illustration
blueprint · schematic · grid · ruler · template · CAD · orthographic · projection · scale · architect
perpendicular
At right angles
- axisRotation reference line
- horizontalParallel to the horizon
- verticalAt right angles groundward
Cartesian · coordinate · normal · intersection · rectilinear · grid · matrix · vector · plane · dimension
- Pythagorean triangleshypotenuse, leg
- geometryangles, circles, shapes, lines, volume
- geometry termscircle, line, side, square, triangle
- Trianglestriangle, equilateral, isosceles, scalene, equilateral triangle
- anglescomplementary angles, supplementary angles, degrees, vertical angles, interior angles
- Screwdriversflathead, Phillips, Phillips head, slotted, Robertson
right angleoblique angle
Angle not ninety degrees
acute angle · obtuse angle · straight angle · reflex angle · skew
right angleoblique angle
Angle not ninety degrees
out of square · crooked · askew · slanted · canted