Question

What does ∆ mean in math?

Answer 1

As far as I know, in math, Δ means:

• triangle
• delta (slope)

Examples:

ΔABC ≅ ΔDEF

• "triangle ABC is congruent to triangle DEF"

Δ =
`(1)/(2)`

• "delta equals 1 over 2"
• Delta is another word for "slope"
• "the slope equals 1 over 2"