Triangle in CorelDraw

You can prove it when you measure with Dimension tool (CorelDraw since x4) or print the result and then measure with ruler.

Notasi:
tool, property bar.

Equilateral triangle / Segitiga sama sisi.

Polygon tool, Number of points or sides on polygon, star and complex star: 3. hold CTRL while dragging/drawing.

Isosceles triangle / Segitiga sama kaki.

Star tool / Polygon tool
Number of points or sides on polygon, star and complex star: 3.
Sharpness of Star and Complex Star: 1. don't hold CTRL while dragging/drawing.

Perfect Shape > Basic Shapes > Isosceles Trapezoid / Trapezium
drag modification node / the red or yellow or blue diamond node to center.

Perfect Shape > Arrow Shapes > Right Arrow / Left Arrow / Up Arrow / Down Arrow / Stripped Right Arrow
drag modification node / the red or yellow or blue diamond node to :
top left corner (Right Arrow).
top right corner (Left Arrow).
bottom left corner (Up Arrow).
top left corner (Down Arrow).
top left corner (Stripped Right Arrow).

Perfect Shape > Flowchart Shapes > Extract / Merge

Perfect Shape > Flowchart Shapes > Collate
step: Arrange > Convert To Curves (Ctrl+Q); Arrange > Convert Outline To Object (Ctrl+Shift+Q); Arrange > Break Curve Apart.

Rectangle tool
hold CTRL while dragging/drawing so you get a right isosceles triangle.
Arrange > Convert To Curves (Ctrl+Q);
Drag two of nodes in any corner to midpoint or center/centre.

Right triangle / Segitiga siku-siku.

Perfect Shape > Basic Shapes > Right Triangle
hold CTRL while dragging/drawing so you get a right isosceles triangle.

Rectangle tool
hold CTRL while dragging/drawing so you get a right isosceles triangle.
Arrange > Convert To Curves (Ctrl+Q);
Drag one of nodes in any corner to center.