Математика22 мин

Triangles

Pythagoras, congruence/similarity rules, special right triangles, and triangle inequality.

Pythagoras and special triangles

a^2 + b^2 = c^2

c

is the hypotenuse (right triangles only).

Memorise both special-angle ratios. They unlock most NUET trig problems without a calculator.

Жаттығу

A triangle has sides 5, 12, $x$ . What integer values of $x$ are possible?

Жауап пен түсініктемені көру

Жауап: $8 \le x \le 16$ (integers)

$|12-5| < x < 12+5$ , so $7 < x < 17$ . Integers: 8 to 16.