A triangle has sides of 11 units, 12 units and 12 units. Is it a right triangle?

A triangle's three sides satisfy $a^2+b^2=c^2$, where c is the longest side. What can you conclude?

A triangle's sides are 23 in, 23 in and 37 in, with the longest side last. Is it a right triangle?

A triangle is shown with its side lengths labeled in meters. Is it a right triangle?

A triangle has sides of 10 ft, 17 ft and 24 ft. Is it a right triangle?

Which statement is the converse of the Pythagorean theorem, the one you use to TEST three side lengths?

The three sides of a triangle measure 14 units, 19 units and 19 units. Does it have a right angle?

The Pythagorean theorem says that in a right triangle, $a^2+b^2=c^2$. Why can't you use the theorem itself to show that a triangle IS a right triangle?

A farmer fences a pen, running 10 ft along one side, 24 ft along the next, and measuring 26 ft between the far ends of the two runs. Is the corner a right angle?

A triangle is shown with its side lengths labeled in centimeters. Let $x$, $y$, and $z$ be those lengths from least to greatest. To test it for a right angle, Ruth checks whether $x^2+z^2$ equals $y^2$. Why is that test wrong?

The figure shows a triangle with all side lengths labeled in meters. Is it a right triangle?

A triangle is drawn with each side length labeled in feet. Is it a right triangle?

Use the triangle whose side lengths are labeled in feet. Is it a right triangle?

The diagram gives a triangle's side lengths in feet. Let $p$, $q$, and $r$ be the labeled lengths from least to greatest. To test it for a right angle, Ben checks whether $p^2+r^2$ equals $q^2$. Why is that test wrong?

A triangle is shown with all three side lengths labeled in centimeters. Is it a right triangle?

A triangle is drawn with all side lengths labeled in meters. Let $u$, $v$, and $w$ be the lengths from least to greatest. To test it for a right angle, Omar checks whether $u^2+w^2$ equals $v^2$. Why is that test wrong?

A builder lays out a patio, measuring 21 m along one edge, 28 m along the next, and 35 m diagonally between the far ends of the two edges. Is the corner a right angle?

Use the triangle whose side lengths are labeled in centimeters. Let $a$, $b$, and $c$ represent those lengths from least to greatest. To test it for a right angle, Leo checks whether $a^2+c^2$ equals $b^2$. Why is that test wrong?

A farmer fences a pen, running 21 ft along one side, 35 ft along the next, and measuring 42 ft between the far ends of the two runs. Is the corner a right angle?

The diagram gives the side lengths of a triangle in inches. Is it a right triangle?

Use the triangle with its side lengths labeled in centimeters. Is it a right triangle?

A triangle is pictured with all side lengths labeled in inches. Is it a right triangle?

The figure gives a triangle's side lengths in feet. Is it a right triangle?

A gardener marks a corner of a bed by measuring 14 ft along one edge, 17 ft along the other, and 25 ft straight between the two far ends. Is the corner a right angle?

The figure shows a triangle with its side lengths labeled in meters. Let $m$, $n$, and $p$ be the labeled lengths from least to greatest. To test it for a right angle, Ruth checks whether $m^2+p^2$ equals $n^2$. Why is that test wrong?

A triangle is shown with all three side lengths labeled in units. Let $r$, $s$, and $t$ be those lengths from least to greatest. To test it for a right angle, Ivy checks whether $r^2+t^2$ equals $s^2$. Why is that test wrong?

A triangle is shown with its three side lengths labeled in inches. Is it a right triangle?

The diagram shows a triangle with its side lengths labeled in centimeters. Does it have a right angle?

The diagram labels every side length of a triangle in meters. Let $d$, $e$, and $f$ be the lengths from least to greatest. To test it for a right angle, Ana checks whether $d^2+f^2$ equals $e^2$. Why is that test wrong?

A tiler measures 15 cm along one wall, 36 cm along the wall beside it, and 39 cm straight between the two marks. Is the corner a right angle?

In a triangle with sides a, b and c, the two shorter sides satisfy $a^2+b^2<c^2$. What does that tell you about the largest angle?

Use the labeled triangle with side lengths in inches. Is it a right triangle?

The figure gives all three side lengths of a triangle in units. Let $g$, $h$, and $j$ be the labeled lengths from least to greatest. To test it for a right angle, Leo checks whether $g^2+j^2$ equals $h^2$. Why is that test wrong?

In a triangle with sides a, b and c, the two shorter sides satisfy $a^2+b^2>c^2$. What does that tell you about the largest angle?

A triangle's sides are 20 in, 26 in and 28 in, with the longest side last. Is it a right triangle?

A triangle is pictured with each side length labeled in feet. Let $A$, $B$, and $C$ be the lengths from least to greatest. To test it for a right angle, Omar checks whether $A^2+C^2$ equals $B^2$. Why is that test wrong?

The figure shows a triangle with each side length labeled in meters. Does it have a right angle?

A tiler measures 26 cm along one wall, 33 cm along the wall beside it, and 49 cm straight between the two marks. Is the corner a right angle?

A triangle is drawn with side lengths labeled in meters. Is it a right triangle?

A gardener marks a corner of a bed by measuring 23 ft along one edge, 28 ft along the other, and 44 ft straight between the two far ends. Is the corner a right angle?