Question
Normally, the condition that $a$ and $b$ both equally zero can be described by ............ .
$
\left(a^2-b^2 \neq 0, a^2+b^2 \neq 0,-a^2+b^2 \neq 0\right)
$
$
\left(a^2-b^2 \neq 0, a^2+b^2 \neq 0,-a^2+b^2 \neq 0\right)
$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Fill in the blanks using the correct word given in brackets:
Two triangles are similar, if their corresponding sides are ........... (proportional, equal).