MATHEMATICS HIGH SCHOOL

If triangle DEF has a 90° angle at vertex E, which statements are true? Check all that apply.Triangle DEF is an obtuse triangle.
The angle at vertex D is acute.
The angle at vertex F is obtuse.
Triangle DEF is a right triangle.
The angle at vertex D is obtuse.

Answers

Answer 1
Answer: draw a diagram (shown below as attachment)

check each option

1st one: obtuse triangle
osbuse means that the triangle has an angle more than 90 degrees
remember that all angles add to 180
90 is one
90+D+F=180
D+F=90
so those 2 mystery angles both have to be less than 90 so therefor none of them can be obtuse
not 1st option


2nd: angle at D is acute
acute means less than 90
so we remember that
D+F=90
no angle can be 0 so let's say F is a very small number like 0.0001
then D would be 89.9999
still less than 90, it is acute
this 2nd optin is right

3rd: angle at F is obtuse
wrong, from 1st one,  no obtuse angles
3rd option is wrong

4th: right triangle
duh, a right triangle has a right angle in it
90 degrees is a right angle
yes
4th optin is right

5th: D is obtuse
naw, fam. no obtuse angles here



the right answers are 2nd and 4th or
The angle at vertex D is acute and
Triangle DEF is a right triangle
Answer 2
Answer:

Answer:

In other words, A, D.

Step-by-step explanation:

Related Questions

In a class, there are io boys and 15 girls. three students are selected at random. The probability that the selected students are 1 boy and 2 girls, is options: a. 25/36 b. 18/23 c. 21/46 d. 1/32
An observation deck extends 314 feet out above a valley. The deck sits 264 feet above the valley floor. If an object is dropped from the observation​ deck, its height h in​ feet, after t​ seconds, is given by h equals negative 16 t squared plus 264. How long will it take for the object to be 8 feet above the valley​ floor?
Fill in the blanks to the picture above
George used the diagram below to help determine 30% of 60. Which expression could George have used?
What is 144 over 324 simplified

a submarine at the water's surface dropped down 100 ft after thirty minutes at that depth it dove an additional 500 ft what was its depth after the second dive

Answers

600 ft I think that would be the answer

Modrater give me answer

if 2x- 35273 = 5361925 than find the value of 1x

​

Answers

Answer:

2x - 35273 = 5361925 \n 2x = 5361925 + 35273 \n 2x = 5397198 \n x = (5397198)/(2) \n x = 2698599

\displaystyle\ 2x-35273=5361925\n\n2x=53\underline{61925}+\underline{35273} \n\n2x=5397198\n\n\nx=(5397198)/(2) =2698599\n\n\underline{x=2698599\qquad }\n\n2\cdot 2698599-35273=5361925\n\n5397198-35273=5361925\n\n5361925=5361925

X + 5 = 1
—
4. Step by step please help!!!

Answers

If you are looking for x. X is -4
X+5=1
-5. -5. ( subtract 5 from both sides)
_________
X = -4 ( 1-5=-4)

Answer: x=-8

Step-by-step explanation:

X+5=1-4

X+5=-3

Now subtract 5 from both sides

X=-8

Which expression is equivalent to 6(3x + 4)?1: 18x + 4
2: 18x + 24
3: 9x + 10
4: 9x + 4

Answers

Answer:

2. 18x + 24

Step-by-step explanation:

Distribute the 6 to create 18x + 24
18x+24
Multiple 6 to both 3x and 4.

Hr Mins

3 40

-1 45

------------

------------

Answers

Answer:

1:55

Step-by-step explanation:

3:40 - 1:45= 1:55

The perimeter of a rectangle is 60 centimeters. The base is 2 times the height. What are the dimensions of the rectangle?

Answers

licenciado en Letrase (base 20 y altura 10 cm. 
Other Questions
3 12 Find the nth term of each sequence. (a) -1, -3, -5, -7, -9, .​
One number is 1 more than 4 times another. Their product is 18. What are the numbers?
The value of 7 is 200 percent of what number?
Round 71195.4277573 to 2 decimal places.