*15 points easy question*
1 answer:
Answer:
Step-by-step explanation:
We are given an isosceles triangle. We need to remember the important rule that the base angles are equal. In this question we need to find the value of 'x' using a perpendicular height of 3 and a base length of 4. In this question we can half the triangle in half to help us find the value of x. Also we need to use Pythagoras theorem to help us find 'x'. Pythagoras states that a² + b² = c² so we want to find the hypotenuse of the triangle. If we half the triangle we get 2 triangle both with a base length of 2 and a perpendicular height of 3 so,
⇒ State Pythagoras theorem
→ a² + b² = c²
⇒ Substitute in the values
→ 3² + 2² = c²
⇒ Simplify
→ 9 + 4 = c²
⇒ Simplify further
→ 13 = c²
⇒ Square root both sides to find the value of 'c'
→ = c
The value of x is the square root of 13
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<u>Answers:</u>
Two <u>triangles are congruent</u> if they have the <u>same sides</u> and the <u>same size</u>.
In other words: they have the same shape and size, regardless of their position or orientation.
If we want to verify if two triangles are congruent, they must fulfill some conditions:
a) Two triangles are congruent if their three sides are respectively equal
b) Two triangles are congruent if two of their sides and the angle between them are respectively of equal length.
c) Two triangles are congruent if they have a congruent side and the angles with vertex at the ends of that side are also congruent.
d) Two triangles are congruent if they have two sides respectively congruent and the angles opposite the greater of the sides are also congruent
<h2>According to these criteria, it is not necessary to verify the congruence of the three sides and three angles of each triangle </h2>
Now, knowing these criteria, let’s answer the questions:
1) Here both triangles are<u> congruent</u> and are <u>Right Triangles</u> (have a right angle or a angle), as well.
This means angle and according to the <u>criterion b</u> listed above, the angle
and angle
.
This can be proven by the rule that states the sum of the three interior angles of a triangle is .
Then, according <u>criterion a</u>, and
.
<u>This can be proven by the use of </u><u>two trigonometric functions,</u> sine and cosine:
<h2>
Where is the <u>Opposite side</u> to the
angle and
is the <u>hypotenuse</u>.
<h2>
≅6m
Where is the <u>Adjacent side</u> to the
angle and
is the <u>hypotenuse</u>.
<h2>Therefore, the answer is B: </h2>
,
,
,
,
2) According to the second figure shown, both triangles are congruent and fulfill the four criteria described above.
Therefore, the answer is:
<h2>CBA≅MPN</h2>
3) “Knowing that line segment AB is the same length as line segment CD is enough to prove that triangles ABD and BCD are congruent”
This statement is <u>True</u>, because <u>both triangles share the line segment BD</u>.
<h2>This means <u>they have two equal sides</u>, and according to <u>criterion b</u> they are congruent </h2>