gabby640
31.12.2019 •
Mathematics
What is the length of side ad? . . 6 cm. 8.5 cm. 10.4 cm. 12 cm
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Ответ:
The length of side AD is 6 cm.
Further explanationWe solve this problem using the principle of trigonometric ratio.
Look at the figure.
Given that the triangle ABC is right-angled at B
Length of AB = 12 cm∠ C = 30°The segment of BD is perpendicular to AC side.We start from this statement:
“sum of measures of angles in a triangle is 180°.”
In the triangle ABC:
∠A + ∠B + ∠C = 180°
∠A + 90° + 30° = 180°
∠A + 120° = 180°
∠A = 180° - 120°
∠A = 60°
See the picture again. The triangle ABD is a right angle at D.
About angle D:
AB is the hypotenuseAD is the adjacent sideBased on trigonometric ratios, the relationship between AD, AB, and angle A is as follows:
We get the length of AD is 6 cm.
Note:
Learn moreFinding the value of sine of angle Multiple choice about trigonometric ratios Trigonometric identitiesKeywords: the length, side AD, right-angled, adjacent, hypotenuse, opposite, sin, cos, tan, sum of measures of angles in triangle are 180°, 30°, 60°
Ответ:
o 3.18 kg
Step-by-step explanation:
1. ENCUENTRA UN DENOMINADOR COMUN
Los denominadores que nos dan son: 4, 2, 5, y 3
Encuentra un numero que es comun cuando multiplicas, seria 60.
2. MULTIPLICA EL NOMINADOR POR LO QUE MULTIPLICASTE EL DOMINADOR
Carne=
Arroz=
Fruta=
Papa=
3. SUMA LAS FRACIONES
Ahora que tienen el mismo denominador, puedes sumar las fraciones
o 3.18 kg