For what value of a does m∠1=90 126 138 150 180

Step-by-step explanation:

we know that

sum of all angles around inscribed a point is always 270

so,

first angle is 42

second angle is x-12

third angle is <1

so, we get

<1 +42 +x-12=270

we can plug <1=90

answer: two high and two low

step-by-step explanation: because the earth rotates through two tidal “bulges” every lunar day, coastal areas experience every 24 hours and 50 minutes. high tides occur 12 hours and 25 minutes apart.