Right triangles: hypotenuse, opposite leg and adjacent leg
The longest side of a right triangle
is the
Hypotenuse
The right angle square always points to the
hypotenuse
Hypotenuse
Hypotenuse
What is the longest side
of a right triangle called
Hypothesis
?
Click on the HYPOTENUSE, the longest side.
.
.
.
Click on the HYPOTENUSE, the longest side.
.
.
.
Click on the HYPOTENUSE, the longest side.
.
.
.
(careful, the hypotenuse is a side, not an angle)
Click on the HYPOTENUSE, the longest side.
.
.
.
.
.
.
(careful, the hypotenuse is a side, not an angle)
Click on the HYPOTENUSE, the longest side.
.
.
.
.
.
.
The other sides of a right Δ
are called the legs.

The side across from
angle A is OPPOSITE angle A
HYPOTENUSE
C
Opposite angle A
B
A
The other sides of a right Δ
are called the legs.

The side across from
angle A is OPPOSITE angle A
HYPOTENUSE
?
C
Side Opposite ∡ A
?
B
A
C
Identify the hypotenuse
and the side opposite ∡C
hypotenuse
?
side
opposite
∡ C
?
B
A
hypotenuse
?
Identify the hypotenuse
and the side opposite ∡C
C
side
opposite
∡ C
?
B
A
hypotenuse
?
Identify the hypotenuse
and the side opposite ∡B
C
side opposite ∡ B
?
B
A
Identify the hypotenuse
and the side opposite ∡C
side
opposite
∡ C
?
B
A
hypotenuse
?
C
Identify the hypotenuse
and the side opposite ∡A
B
A
side opposite ∡ A
?
hypotenuse
?
C
The red and black
houses are
ADJACENT to
the yellow
house.
ADJACENT means
next to,
adjoining,
neighboring.
Which house is adjacent to the red house?
red house
yellow house
black house
 yellow and black houses
ADJACENT means
next to,
adjoining,
neighboring.
Which house is adjacent to the black house?
red house
yellow house
black house
 yellow and black houses
ADJACENT means
next to,
adjoining,
neighboring.
Which house is adjacent to the yellow house?
red house
yellow house
black house
 red and black houses
ADJACENT means
next to,
adjoining,
neighboring.
The side across from
angle A is OPPOSITE ∡ A
The side next to
angle A is adjacent to ∡A
HYPOTENUSE
C
Side Opposite ∡ A
side
Adjacent
to ∡A
B
A
HYPOTENUSE
?
1st: Identify the HYPOTENUSE
2nd: Identify the OPPOSITE SIDE
3rd: Only the ADJACENT SIDE is left
C
Side
Opposite
 ∡ A
?
side
Adjacent
to ∡A
?
B
A
HYPOTENUSE
?
1st: Identify the HYPOTENUSE
2nd: Identify the OPPOSITE SIDE
3rd: Only the ADJACENT SIDE is left
C
side
Adjacent
to ∡C
?
Side
Opposite
 ∡ C
?
B
A
1st: Identify the HYPOTENUSE
2nd: Identify the OPPOSITE SIDE
3rd: Only the ADJACENT SIDE is left
HYPOTENUSE
?
C
Side
Opposite
∡ B
?
A
B
Side
Adjacent
to ∡B
?
1st: Identify the HYPOTENUSE
2nd: Identify the OPPOSITE SIDE
3rd: Only the ADJACENT SIDE is left
HYPOTENUSE
?
C
Side
Adjacent
to ∡C
?
A
B
Side
Opposite
∡ C
?
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